{"id":5811,"date":"2026-06-03T07:56:53","date_gmt":"2026-06-03T07:56:53","guid":{"rendered":"https:\/\/ksquareinstitute.in\/blog\/?p=5811"},"modified":"2026-06-03T07:56:55","modified_gmt":"2026-06-03T07:56:55","slug":"re-neet-2026-physics-formula-sheet","status":"publish","type":"post","link":"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-physics-formula-sheet\/","title":{"rendered":"Re-NEET 2026 Physics Formula Sheet: All Formulas You Must Revise Before June 21"},"content":{"rendered":"\n<p>With June 21 just days away, your <strong>Re-NEET 2026 Physics formula sheet<\/strong> revision needs to be sharp, fast, and complete. Physics in NEET is not about memorising \u2014 it&#8217;s about knowing which formula to apply in under 30 seconds. This Re-NEET 2026 Physics formula sheet covers every high-weightage chapter with the exact formula, a plain-English explanation, and a solved example so you understand <em>how<\/em> to use it \u2014 not just what it looks like. Think of this as your NEET Physics revision sheet \u2014 one page, all chapters, exam-ready.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"432\" src=\"https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Formula-Sheet-\u2014-Complete-Revision-Guide-1024x432.jpg\" alt=\"Re-NEET 2026 Physics formula sheet covering all high-weightage chapters with solved examples\" class=\"wp-image-5812\" style=\"border-top-left-radius:12px;border-top-right-radius:12px;border-bottom-left-radius:12px;border-bottom-right-radius:12px\" srcset=\"https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Formula-Sheet-\u2014-Complete-Revision-Guide-1024x432.jpg 1024w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Formula-Sheet-\u2014-Complete-Revision-Guide-300x127.jpg 300w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Formula-Sheet-\u2014-Complete-Revision-Guide-768x324.jpg 768w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Formula-Sheet-\u2014-Complete-Revision-Guide-1536x648.jpg 1536w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Formula-Sheet-\u2014-Complete-Revision-Guide.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Bookmark this page. Come back to it every morning before June 21. Pair this with your <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-chemistry-formula-sheet\">Re-NEET 2026 Chemistry formula sheet<\/a> for a full science revision block.<\/p>\n\n\n\n<div class=\"wp-block-rank-math-toc-block\" id=\"rank-math-toc\"><h2>Table of Contents<\/h2><nav><ul><li><a href=\"#how-to-use-this-formula-sheet\">How to Use This Formula Sheet<\/a><\/li><li><a href=\"#chapter-priority-guide-for-this-formula-sheet\">Chapter Priority Guide for This Formula Sheet<\/a><\/li><li><a href=\"#chapter-1-kinematics-\u2605\u2605\u2605\">Chapter 1: Kinematics \u2605\u2605\u2605<\/a><ul><li><a href=\"#1-1-equations-of-motion-uniformly-accelerated-motion\">1.1 Equations of Motion (Uniformly Accelerated Motion)<\/a><\/li><li><a href=\"#1-2-projectile-motion\">1.2 Projectile Motion<\/a><\/li><\/ul><\/li><li><a href=\"#chapter-2-laws-of-motion-\u2605\u2605\u2605\">Chapter 2: Laws of Motion \u2605\u2605\u2605<\/a><ul><li><a href=\"#2-1-newtons-laws\">2.1 Newton&#8217;s Laws<\/a><\/li><li><a href=\"#2-2-friction\">2.2 Friction<\/a><\/li><\/ul><\/li><li><a href=\"#chapter-3-work-energy-and-power-\u2605\u2605\u2605\">Chapter 3: Work, Energy and Power \u2605\u2605\u2605<\/a><ul><li><a href=\"#3-1-work\">3.1 Work<\/a><\/li><li><a href=\"#3-2-kinetic-and-potential-energy\">3.2 Kinetic and Potential Energy<\/a><\/li><li><a href=\"#3-3-power\">3.3 Power<\/a><\/li><\/ul><\/li><li><a href=\"#chapter-4-rotational-motion-\u2605\u2605\u2605\">Chapter 4: Rotational Motion \u2605\u2605\u2605<\/a><ul><li><a href=\"#4-1-moment-of-inertia\">4.1 Moment of Inertia<\/a><\/li><li><a href=\"#4-2-key-moments-of-inertia-must-memorise\">4.2 Key Moments of Inertia (Must Memorise)<\/a><\/li><li><a href=\"#4-3-rolling-motion\">4.3 Rolling Motion<\/a><\/li><\/ul><\/li><li><a href=\"#chapter-5-gravitation-\u2605\u2605\">Chapter 5: Gravitation \u2605\u2605<\/a><\/li><li><a href=\"#chapter-6-thermodynamics-\u2605\u2605\u2605\">Chapter 6: Thermodynamics \u2605\u2605\u2605<\/a><\/li><li><a href=\"#chapter-7-electrostatics-\u2605\u2605\u2605\">Chapter 7: Electrostatics \u2605\u2605\u2605<\/a><\/li><li><a href=\"#chapter-8-current-electricity-\u2605\u2605\u2605\">Chapter 8: Current Electricity \u2605\u2605\u2605<\/a><\/li><li><a href=\"#chapter-9-magnetic-effects-of-current-magnetism-\u2605\u2605\u2605\">Chapter 9: Magnetic Effects of Current &amp; Magnetism \u2605\u2605\u2605<\/a><\/li><li><a href=\"#chapter-10-ray-optics-\u2605\u2605\u2605\">Chapter 10: Ray Optics \u2605\u2605\u2605<\/a><\/li><li><a href=\"#chapter-11-wave-optics-\u2605\u2605\">Chapter 11: Wave Optics \u2605\u2605<\/a><\/li><li><a href=\"#chapter-12-modern-physics-\u2605\u2605\u2605\">Chapter 12: Modern Physics \u2605\u2605\u2605<\/a><ul><li><a href=\"#12-1-photoelectric-effect\">12.1 Photoelectric Effect<\/a><\/li><li><a href=\"#12-2-bohrs-atomic-model\">12.2 Bohr&#8217;s Atomic Model<\/a><\/li><li><a href=\"#12-3-nuclear-physics-radioactivity\">12.3 Nuclear Physics &amp; Radioactivity<\/a><\/li><\/ul><\/li><li><a href=\"#chapter-13-electromagnetic-induction-ac-\u2605\u2605\u2605\">Chapter 13: Electromagnetic Induction &amp; AC \u2605\u2605\u2605<\/a><\/li><li><a href=\"#chapter-14-simple-harmonic-motion-shm-\u2605\u2605\">Chapter 14: Simple Harmonic Motion (SHM) \u2605\u2605<\/a><\/li><li><a href=\"#quick-reference-constants-you-must-know\">Quick Reference: Constants You Must Know<\/a><\/li><li><a href=\"#last-day-revision-tip-from-k-square\">Last-Day Revision Tip from KSquare<\/a><\/li><li><a href=\"#faq-section\">FAQ Section<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"how-to-use-this-formula-sheet\">How to Use This Formula Sheet<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Read the <strong>plain-English explanation<\/strong> first \u2014 it tells you <em>when<\/em> to apply the formula<\/li>\n\n\n\n<li>Study the <strong>solved example<\/strong> \u2014 NEET questions are almost always structured like these<\/li>\n\n\n\n<li>Don&#8217;t just read \u2014 write each formula once in your notebook after reading it<\/li>\n\n\n\n<li>Prioritise chapters marked <strong>\u2605\u2605\u2605<\/strong> (highest NEET weightage)<\/li>\n\n\n\n<li>Use this Re-NEET 2026 Physics formula sheet alongside mock tests \u2014 apply each formula immediately after revising it<\/li>\n\n\n\n<li>This NEET Physics revision sheet is structured by chapter weight \u2014 spend most time on \u2605\u2605\u2605 chapters<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-priority-guide-for-this-formula-sheet\">Chapter Priority Guide for This Formula Sheet<\/h2>\n\n\n\n<p>Not all chapters in this Re-NEET 2026 Physics formula sheet deserve equal time. Here&#8217;s how to prioritise your NEET Physics revision sheet sessions based on chapter weight and formula complexity:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Chapter<\/th><th>NEET Weightage<\/th><th>Formula Density<\/th><th>Priority<\/th><\/tr><\/thead><tbody><tr><td>Current Electricity<\/td><td>Very High (4\u20135 Qs)<\/td><td>Medium<\/td><td>\u2605\u2605\u2605 Revise first<\/td><\/tr><tr><td>Electrostatics<\/td><td>High (3\u20134 Qs)<\/td><td>Medium<\/td><td>\u2605\u2605\u2605 Revise first<\/td><\/tr><tr><td>Ray Optics<\/td><td>High (3\u20134 Qs)<\/td><td>Low<\/td><td>\u2605\u2605\u2605 Easy marks<\/td><\/tr><tr><td>Modern Physics<\/td><td>High (3\u20134 Qs)<\/td><td>Low<\/td><td>\u2605\u2605\u2605 Direct formulas<\/td><\/tr><tr><td>Mechanics (Kinematics + Laws + WEP)<\/td><td>Very High (5\u20136 Qs)<\/td><td>High<\/td><td>\u2605\u2605\u2605 Foundation<\/td><\/tr><tr><td>Rotational Motion<\/td><td>Medium (2\u20133 Qs)<\/td><td>High<\/td><td>\u2605\u2605 After above<\/td><\/tr><tr><td>Magnetic Effects<\/td><td>Medium (2\u20133 Qs)<\/td><td>Medium<\/td><td>\u2605\u2605 Important<\/td><\/tr><tr><td>Thermodynamics<\/td><td>Medium (2\u20133 Qs)<\/td><td>Medium<\/td><td>\u2605\u2605 Don&#8217;t skip<\/td><\/tr><tr><td>EMI &amp; AC<\/td><td>Medium (2 Qs)<\/td><td>Medium<\/td><td>\u2605\u2605 High ROI<\/td><\/tr><tr><td>Wave Optics<\/td><td>Low-Medium (1\u20132 Qs)<\/td><td>Low<\/td><td>\u2605 Quick revision<\/td><\/tr><tr><td>Gravitation<\/td><td>Low-Medium (1\u20132 Qs)<\/td><td>Low<\/td><td>\u2605 Direct formulas<\/td><\/tr><tr><td>SHM<\/td><td>Low (1\u20132 Qs)<\/td><td>Low<\/td><td>\u2605 Last<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>How to use this table for Re-NEET 2026 Physics preparation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If you have 3 days left: cover \u2605\u2605\u2605 chapters only<\/li>\n\n\n\n<li>If you have 5+ days: cover all chapters in order<\/li>\n\n\n\n<li>This NEET Physics revision sheet is most effective when you solve 1\u20132 MCQs immediately after each formula block<\/li>\n<\/ul>\n\n\n\n<p>The NEET Physics important formulas 2026 that appear most directly in MCQ options are from Current Electricity, Ray Optics, and Modern Physics \u2014 which is why this Re-NEET 2026 Physics formula sheet front-loads the most formula-dense chapters first. Use this alongside the <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-last-2-weeks-preparation\">final weeks revision plan<\/a> guide to build a day-by-day schedule around these chapters.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-1-kinematics-\u2605\u2605\u2605\">Chapter 1: Kinematics \u2605\u2605\u2605<\/h2>\n\n\n\n<p>Kinematics deals with motion \u2014 how far something moves, how fast, and how its speed changes. These are the most straightforward formula-apply questions in NEET. For Re-NEET 2026 Physics preparation, always start your revision here \u2014 these formulas appear in almost every mock test.<\/p>\n\n\n\n<p>Your <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-complete-study-plan\">Re-NEET 2026 complete study plan<\/a> also recommends starting with Mechanics in the final sprint.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-1-equations-of-motion-uniformly-accelerated-motion\">1.1 Equations of Motion (Uniformly Accelerated Motion)<\/h3>\n\n\n\n<p><strong>Formula 1:<\/strong> v = u + at<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Final velocity = initial velocity + (acceleration \u00d7 time). Use this when you know u, a, t and need v.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 2:<\/strong> s = ut + \u00bdat\u00b2<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Displacement = initial velocity \u00d7 time + half of acceleration \u00d7 time squared. Use this when you need distance covered.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 3:<\/strong> v\u00b2 = u\u00b2 + 2as<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Final velocity squared = initial velocity squared + 2 \u00d7 acceleration \u00d7 displacement. Use this when time is NOT given.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 4:<\/strong> s = (u + v)\/2 \u00d7 t<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Displacement = average velocity \u00d7 time. Quick formula when you have both u and v.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A car starts from rest and accelerates at 4 m\/s\u00b2 for 5 seconds. Find the distance covered.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>u = 0 (starts from rest), a = 4 m\/s\u00b2, t = 5 s<\/li>\n\n\n\n<li>s = ut + \u00bdat\u00b2 = 0 \u00d7 5 + \u00bd \u00d7 4 \u00d7 25 = <strong>50 m<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"1-2-projectile-motion\">1.2 Projectile Motion<\/h3>\n\n\n\n<p><strong>Formula 5:<\/strong> Time of flight \u2192 T = 2u sin\u03b8 \/ g<\/p>\n\n\n\n<p><strong>Formula 6:<\/strong> Maximum height \u2192 H = u\u00b2 sin\u00b2\u03b8 \/ 2g<\/p>\n\n\n\n<p><strong>Formula 7:<\/strong> Horizontal range \u2192 R = u\u00b2 sin2\u03b8 \/ g<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> For maximum range, \u03b8 = 45\u00b0. sin 2\u03b8 is maximum (= 1) at 2\u03b8 = 90\u00b0.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A ball is projected at 20 m\/s at 30\u00b0 to the horizontal. Find the maximum height. (g = 10 m\/s\u00b2)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H = u\u00b2 sin\u00b2\u03b8 \/ 2g = (20)\u00b2 \u00d7 sin\u00b230\u00b0 \/ (2 \u00d7 10)<\/li>\n\n\n\n<li>= 400 \u00d7 (0.5)\u00b2 \/ 20 = 400 \u00d7 0.25 \/ 20 = 100\/20 = <strong>5 m<\/strong><\/li>\n<\/ul>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n<meta charset=\"UTF-8\" \/>\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" \/>\n<title>Brahmastra RE-NEET Banners<\/title>\n<style>\n  #ksq2-root {\n    all: initial;\n    display: block;\n    box-sizing: border-box;\n    width: 100%;\n  }\n  #ksq2-root *,\n  #ksq2-root *::before,\n  #ksq2-root *::after {\n    box-sizing: border-box;\n    margin: 0;\n    padding: 0;\n  }\n  #ksq2-root .ksq2-wrap {\n    position: relative;\n    width: 100%;\n    max-width: 900px;\n    margin: 0 auto;\n    overflow: hidden;\n    border-radius: 14px;\n    background: #111;\n  }\n  #ksq2-root .ksq2-slides {\n    display: flex;\n    transition: transform 0.55s cubic-bezier(.4,0,.2,1);\n    will-change: transform;\n  }\n  #ksq2-root .ksq2-slide {\n    min-width: 100%;\n    display: block;\n    position: relative;\n  }\n  #ksq2-root .ksq2-slide a {\n    display: block;\n    text-decoration: none;\n  }\n  #ksq2-root .ksq2-slide img {\n    width: 100%;\n    display: block;\n    height: auto;\n    border: none;\n    outline: none;\n  }\n  #ksq2-root .ksq2-progress {\n    position: absolute;\n    bottom: 0;\n    left: 0;\n    height: 3px;\n    background: rgba(255,255,255,0.9);\n    width: 0%;\n    border-radius: 0 2px 2px 0;\n    pointer-events: none;\n  }\n  #ksq2-root .ksq2-nav {\n    position: absolute;\n    top: 50%;\n    transform: translateY(-50%);\n    background: rgba(255,255,255,0.15);\n    border: 1px solid rgba(255,255,255,0.2);\n    color: #fff;\n    width: 40px;\n    height: 40px;\n    border-radius: 50%;\n    cursor: pointer;\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    font-size: 22px;\n    line-height: 1;\n    transition: background 0.2s;\n    z-index: 2;\n    font-family: sans-serif;\n    padding: 0;\n    outline: none;\n  }\n  #ksq2-root .ksq2-nav:hover { background: rgba(255,255,255,0.3); 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return; }\n    rafId = requestAnimationFrame(tick);\n  }\n\n  document.querySelector('#ksq2Wrap .ksq2-prev').addEventListener('click', function () { goTo(current - 1); });\n  document.querySelector('#ksq2Wrap .ksq2-next').addEventListener('click', function () { goTo(current + 1); });\n  dots.forEach(function (d, i) { d.addEventListener('click', function () { goTo(i); }); });\n\n  wrapEl.addEventListener('mouseenter', function () {\n    paused = true;\n    cancelAnimationFrame(rafId);\n  });\n  wrapEl.addEventListener('mouseleave', function () {\n    paused = false;\n    var elapsed = parseFloat(progressEl.style.width) \/ 100 * duration;\n    startTime = null;\n    rafId = requestAnimationFrame(function (ts) {\n      startTime = ts - elapsed;\n      tick(ts);\n    });\n  });\n\n  rafId = requestAnimationFrame(tick);\n})();\n<\/script>\n\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-2-laws-of-motion-\u2605\u2605\u2605\">Chapter 2: Laws of Motion \u2605\u2605\u2605<\/h2>\n\n\n\n<p>Newton&#8217;s laws are the foundation of all mechanics. In any Re-NEET 2026 Physics formula sheet, this chapter must sit at the top. NEET loves free-body diagram questions and friction problems from this chapter.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-1-newtons-laws\">2.1 Newton&#8217;s Laws<\/h3>\n\n\n\n<p><strong>Formula 8:<\/strong> F = ma<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Force = mass \u00d7 acceleration. The single most important equation in mechanics. Net force on an object equals mass times its acceleration.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 9:<\/strong> Impulse \u2192 J = F \u00d7 t = \u0394p = m(v \u2212 u)<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Impulse = change in momentum. If a force acts for a short time, use impulse.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2-2-friction\">2.2 Friction<\/h3>\n\n\n\n<p><strong>Formula 10:<\/strong> f = \u03bcN<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Friction force = coefficient of friction \u00d7 normal force. For static friction: f \u2264 \u03bc\u209bN. For kinetic friction: f = \u03bc\u2096N.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A block of mass 5 kg is pushed along a surface with \u03bc\u2096 = 0.3. Find the friction force. (g = 10 m\/s\u00b2)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>N = mg = 5 \u00d7 10 = 50 N<\/li>\n\n\n\n<li>f = \u03bc\u2096N = 0.3 \u00d7 50 = <strong>15 N<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-3-work-energy-and-power-\u2605\u2605\u2605\">Chapter 3: Work, Energy and Power \u2605\u2605\u2605<\/h2>\n\n\n\n<p>This is one of the most formula-rich sections in the Re-NEET 2026 Physics formula sheet. Every formula here has appeared in NEET at least once in the past 5 years \u2014 treat them all as guaranteed syllabus for Re-NEET 2026 Physics preparation.<\/p>\n\n\n\n<p>NEET consistently tests energy conservation and work-energy theorem. These are highly scoring NEET Physics important formulas 2026 if you know them cold.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-1-work\">3.1 Work<\/h3>\n\n\n\n<p><strong>Formula 11:<\/strong> W = F \u00d7 d \u00d7 cos\u03b8<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Work = Force \u00d7 displacement \u00d7 cosine of angle between them. If force and displacement are in the same direction, \u03b8 = 0\u00b0 and cos0\u00b0 = 1, so W = Fd.<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-2-kinetic-and-potential-energy\">3.2 Kinetic and Potential Energy<\/h3>\n\n\n\n<p><strong>Formula 12:<\/strong> KE = \u00bdmv\u00b2<\/p>\n\n\n\n<p><strong>Formula 13:<\/strong> PE (gravitational) = mgh<\/p>\n\n\n\n<p><strong>Formula 14:<\/strong> Conservation of energy \u2192 KE\u2081 + PE\u2081 = KE\u2082 + PE\u2082<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"3-3-power\">3.3 Power<\/h3>\n\n\n\n<p><strong>Formula 15:<\/strong> P = W\/t = Fv<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Power is the rate of doing work. Also equals force \u00d7 velocity.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A 2 kg object falls from rest through a height of 10 m. Find its velocity just before hitting the ground. (g = 10 m\/s\u00b2)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Using energy conservation: mgh = \u00bdmv\u00b2<\/li>\n\n\n\n<li>v\u00b2 = 2gh = 2 \u00d7 10 \u00d7 10 = 200<\/li>\n\n\n\n<li>v = \u221a200 = <strong>10\u221a2 \u2248 14.14 m\/s<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-4-rotational-motion-\u2605\u2605\u2605\">Chapter 4: Rotational Motion \u2605\u2605\u2605<\/h2>\n\n\n\n<p>For Re-NEET 2026 Physics preparation, Rotational Motion is the chapter students most often leave incomplete. Don&#8217;t. It&#8217;s worth 2\u20133 questions every year. The moment of inertia table in this Re-NEET 2026 Physics formula sheet is a direct marks-saver.<\/p>\n\n\n\n<p>One of the toughest chapters \u2014 but NEET asks 2\u20133 questions here every year. For your Re-NEET 2026 Physics formula sheet, the moment of inertia table and rolling motion formulas are non-negotiable.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-1-moment-of-inertia\">4.1 Moment of Inertia<\/h3>\n\n\n\n<p><strong>Formula 16:<\/strong> \u03c4 = I\u03b1<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Torque = Moment of Inertia \u00d7 angular acceleration. This is the rotational equivalent of F = ma.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 17:<\/strong> L = I\u03c9 (Angular momentum)<\/p>\n\n\n\n<p><strong>Formula 18:<\/strong> KE (rotational) = \u00bdI\u03c9\u00b2<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-2-key-moments-of-inertia-must-memorise\">4.2 Key Moments of Inertia (Must Memorise)<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Body<\/th><th>Axis<\/th><th>Formula<\/th><\/tr><\/thead><tbody><tr><td>Solid sphere<\/td><td>Through centre<\/td><td>2\/5 MR\u00b2<\/td><\/tr><tr><td>Hollow sphere<\/td><td>Through centre<\/td><td>2\/3 MR\u00b2<\/td><\/tr><tr><td>Solid cylinder\/disc<\/td><td>Through centre<\/td><td>1\/2 MR\u00b2<\/td><\/tr><tr><td>Thin rod<\/td><td>Through centre<\/td><td>1\/12 ML\u00b2<\/td><\/tr><tr><td>Thin rod<\/td><td>Through end<\/td><td>1\/3 ML\u00b2<\/td><\/tr><tr><td>Ring<\/td><td>Through centre<\/td><td>MR\u00b2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-3-rolling-motion\">4.3 Rolling Motion<\/h3>\n\n\n\n<p><strong>Formula 19:<\/strong> Total KE (rolling) = \u00bdmv\u00b2 + \u00bdI\u03c9\u00b2<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> A rolling body has both translational KE (\u00bdmv\u00b2) and rotational KE (\u00bdI\u03c9\u00b2). For a solid sphere rolling: Total KE = 7\/10 mv\u00b2<\/p>\n<\/blockquote>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A solid sphere of mass 2 kg and radius 0.1 m rolls without slipping at 5 m\/s. Find its total KE.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Total KE = 7\/10 mv\u00b2 = 7\/10 \u00d7 2 \u00d7 25 = <strong>35 J<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-5-gravitation-\u2605\u2605\">Chapter 5: Gravitation \u2605\u2605<\/h2>\n\n\n\n<p>Gravitation is one of the cleanest sections in this Re-NEET 2026 Physics formula sheet \u2014 just 6 formulas, all direct substitution. NEET Physics important formulas 2026 from this chapter are very predictable.<\/p>\n\n\n\n<p>Gravitation questions in NEET are usually direct formula substitution \u2014 very scoring if you remember the Re-NEET Physics chapter formulas here. These are among the easiest marks available.<\/p>\n\n\n\n<p><strong>Formula 20:<\/strong> F = Gm\u2081m\u2082\/r\u00b2 (Newton&#8217;s Law of Gravitation)<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Force between two masses is proportional to the product of masses and inversely proportional to the square of distance. G = 6.67 \u00d7 10\u207b\u00b9\u00b9 N m\u00b2\/kg\u00b2<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 21:<\/strong> g = GM\/R\u00b2 (acceleration due to gravity on surface)<\/p>\n\n\n\n<p><strong>Formula 22:<\/strong> g at height h \u2192 g\u2095 = g(1 \u2212 2h\/R) [when h &lt;&lt; R]<\/p>\n\n\n\n<p><strong>Formula 23:<\/strong> Orbital velocity \u2192 v\u2092 = \u221a(GM\/r) = \u221a(gR\u00b2\/r)<\/p>\n\n\n\n<p><strong>Formula 24:<\/strong> Escape velocity \u2192 v\u2091 = \u221a(2GM\/R) = \u221a(2gR) = 11.2 km\/s for Earth<\/p>\n\n\n\n<p><strong>Formula 25:<\/strong> Time period of satellite \u2192 T = 2\u03c0\u221a(r\u00b3\/GM)<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> Find the escape velocity from Earth. (g = 10 m\/s\u00b2, R = 6.4 \u00d7 10\u2076 m)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>v\u2091 = \u221a(2gR) = \u221a(2 \u00d7 10 \u00d7 6.4 \u00d7 10\u2076) = \u221a(1.28 \u00d7 10\u2078)<\/li>\n\n\n\n<li>= <strong>11,314 m\/s \u2248 11.3 km\/s<\/strong> \u2713 (matches standard value)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-6-thermodynamics-\u2605\u2605\u2605\">Chapter 6: Thermodynamics \u2605\u2605\u2605<\/h2>\n\n\n\n<p>Thermodynamics carries 3\u20134 questions in NEET every year. First law and the ideal gas law are must-knows. These are NEET Physics important formulas 2026 that reward students who practise even one or two numerical problems.<\/p>\n\n\n\n<p><strong>Formula 26:<\/strong> First Law of Thermodynamics \u2192 \u0394U = Q \u2212 W<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Change in internal energy = Heat added to system \u2212 Work done BY the system. Sign convention is critical here.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 27:<\/strong> Ideal Gas Law \u2192 PV = nRT<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Pressure \u00d7 Volume = moles \u00d7 universal gas constant \u00d7 temperature. R = 8.314 J\/mol\u00b7K<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 28:<\/strong> Work done in isothermal process \u2192 W = nRT ln(V\u2082\/V\u2081)<\/p>\n\n\n\n<p><strong>Formula 29:<\/strong> Efficiency of Carnot engine \u2192 \u03b7 = 1 \u2212 T\u2082\/T\u2081 = (T\u2081 \u2212 T\u2082)\/T\u2081<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> T\u2081 = temperature of hot source, T\u2082 = temperature of cold sink. Both in Kelvin.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 30:<\/strong> Cp \u2212 Cv = R (Mayer&#8217;s relation)<\/p>\n\n\n\n<p><strong>Formula 31:<\/strong> \u03b3 = Cp\/Cv \u2192 Monoatomic: \u03b3 = 5\/3 | Diatomic: \u03b3 = 7\/5<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A Carnot engine operates between 600 K and 300 K. Find its efficiency.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u03b7 = 1 \u2212 T\u2082\/T\u2081 = 1 \u2212 300\/600 = 1 \u2212 0.5 = <strong>50%<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-7-electrostatics-\u2605\u2605\u2605\">Chapter 7: Electrostatics \u2605\u2605\u2605<\/h2>\n\n\n\n<p>One of the highest-scoring chapters. Coulomb&#8217;s law, electric field, and potential are asked almost every year. If you only have two days left, this is the chapter to prioritise. Check the <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-19-day-plan\">Re-NEET 2026 19 day plan<\/a> for a hour-by-hour breakdown of how to slot these chapters.<\/p>\n\n\n\n<p><strong>Formula 32:<\/strong> Coulomb&#8217;s Law \u2192 F = kq\u2081q\u2082\/r\u00b2<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> k = 9 \u00d7 10\u2079 N m\u00b2\/C\u00b2. Force between charges is attractive for unlike charges, repulsive for like charges.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 33:<\/strong> Electric field \u2192 E = F\/q = kQ\/r\u00b2<\/p>\n\n\n\n<p><strong>Formula 34:<\/strong> Electric potential \u2192 V = kQ\/r<\/p>\n\n\n\n<p><strong>Formula 35:<\/strong> Relation between E and V \u2192 E = \u2212dV\/dr<\/p>\n\n\n\n<p><strong>Formula 36:<\/strong> Energy stored in capacitor \u2192 U = \u00bdCV\u00b2 = Q\u00b2\/2C = QV\/2<\/p>\n\n\n\n<p><strong>Formula 37:<\/strong> Capacitors in series \u2192 1\/C = 1\/C\u2081 + 1\/C\u2082<\/p>\n\n\n\n<p><strong>Formula 38:<\/strong> Capacitors in parallel \u2192 C = C\u2081 + C\u2082<\/p>\n\n\n\n<p><strong>Formula 39:<\/strong> Capacitance with dielectric \u2192 C = \u03b5\u2092A\/d (parallel plate); with dielectric: C = K\u03b5\u2092 A\/d<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> Two charges of +4 \u03bcC and +4 \u03bcC are placed 0.2 m apart. Find the force between them.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>F = kq\u2081q\u2082\/r\u00b2 = (9\u00d710\u2079 \u00d7 4\u00d710\u207b\u2076 \u00d7 4\u00d710\u207b\u2076) \/ (0.2)\u00b2<\/li>\n\n\n\n<li>= (9\u00d710\u2079 \u00d7 16\u00d710\u207b\u00b9\u00b2) \/ 0.04<\/li>\n\n\n\n<li>= 144\u00d710\u207b\u00b3 \/ 0.04 = <strong>3.6 N<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-8-current-electricity-\u2605\u2605\u2605\">Chapter 8: Current Electricity \u2605\u2605\u2605<\/h2>\n\n\n\n<p>No Re-NEET 2026 Physics formula sheet is complete without a thorough Current Electricity section. This is the chapter where NEET Physics important formulas 2026 are applied most directly \u2014 read a circuit, apply a formula, get the mark.<\/p>\n\n\n\n<p>Highest-weightage chapter in Class 12 Physics for NEET. Circuit problems, Ohm&#8217;s law, and Kirchhoff&#8217;s laws are standard. These are the Re-NEET Physics chapter formulas you absolutely cannot go into the exam without knowing cold.<\/p>\n\n\n\n<p><strong>Formula 40:<\/strong> Ohm&#8217;s Law \u2192 V = IR<\/p>\n\n\n\n<p><strong>Formula 41:<\/strong> Resistivity \u2192 R = \u03c1L\/A<\/p>\n\n\n\n<p><strong>Formula 42:<\/strong> Resistors in series \u2192 R = R\u2081 + R\u2082 + R\u2083<\/p>\n\n\n\n<p><strong>Formula 43:<\/strong> Resistors in parallel \u2192 1\/R = 1\/R\u2081 + 1\/R\u2082 + 1\/R\u2083<\/p>\n\n\n\n<p><strong>Formula 44:<\/strong> Power in a circuit \u2192 P = VI = I\u00b2R = V\u00b2\/R<\/p>\n\n\n\n<p><strong>Formula 45:<\/strong> Kirchhoff&#8217;s Current Law (KCL) \u2192 \u03a3I (at junction) = 0<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Sum of currents entering a junction = Sum of currents leaving it.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 46:<\/strong> Kirchhoff&#8217;s Voltage Law (KVL) \u2192 \u03a3V (in a loop) = 0<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Sum of all EMFs and potential drops around any closed loop = zero.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 47:<\/strong> Wheatstone bridge balance condition \u2192 P\/Q = R\/S<\/p>\n\n\n\n<p><strong>Formula 48:<\/strong> EMF and terminal voltage \u2192 V = E \u2212 Ir (during discharge); V = E + Ir (during charging)<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A 6 \u03a9 and 3 \u03a9 resistor are connected in parallel. Find the equivalent resistance.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1\/R = 1\/6 + 1\/3 = 1\/6 + 2\/6 = 3\/6 = 1\/2<\/li>\n\n\n\n<li>R = <strong>2 \u03a9<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-9-magnetic-effects-of-current-magnetism-\u2605\u2605\u2605\">Chapter 9: Magnetic Effects of Current &amp; Magnetism \u2605\u2605\u2605<\/h2>\n\n\n\n<p>Magnetism formulas are among the most-tested Re-NEET Physics chapter formulas in Class 12. Students who know F = qvBsin\u03b8 and the solenoid formula cold rarely drop marks here.<\/p>\n\n\n\n<p>Biot-Savart law, Ampere&#8217;s law, and force on a moving charge are standard NEET questions.<\/p>\n\n\n\n<p><strong>Formula 49:<\/strong> Force on a moving charge \u2192 F = qvB sin\u03b8<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> F = charge \u00d7 velocity \u00d7 magnetic field \u00d7 sin of angle between v and B. Maximum when \u03b8 = 90\u00b0.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 50:<\/strong> Force on a current-carrying conductor \u2192 F = BIL sin\u03b8<\/p>\n\n\n\n<p><strong>Formula 51:<\/strong> Magnetic field at centre of circular loop \u2192 B = \u03bc\u2092I\/2r<\/p>\n\n\n\n<p><strong>Formula 52:<\/strong> Magnetic field inside a solenoid \u2192 B = \u03bc\u2092nI<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> n = number of turns per unit length. \u03bc\u2092 = 4\u03c0 \u00d7 10\u207b\u2077 T\u00b7m\/A<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 53:<\/strong> Torque on a current loop \u2192 \u03c4 = nBIA sin\u03b8 (or \u03c4 = MB sin\u03b8)<\/p>\n\n\n\n<p><strong>Formula 54:<\/strong> Radius of circular motion of charge in magnetic field \u2192 r = mv\/qB<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A proton (mass = 1.67 \u00d7 10\u207b\u00b2\u2077 kg, charge = 1.6 \u00d7 10\u207b\u00b9\u2079 C) moves at 2 \u00d7 10\u2076 m\/s perpendicular to a magnetic field of 0.5 T. Find the radius of its circular path.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>r = mv\/qB = (1.67\u00d710\u207b\u00b2\u2077 \u00d7 2\u00d710\u2076) \/ (1.6\u00d710\u207b\u00b9\u2079 \u00d7 0.5)<\/li>\n\n\n\n<li>= 3.34\u00d710\u207b\u00b2\u00b9 \/ 8\u00d710\u207b\u00b2\u2070 = <strong>0.04175 m \u2248 4.2 cm<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-10-ray-optics-\u2605\u2605\u2605\">Chapter 10: Ray Optics \u2605\u2605\u2605<\/h2>\n\n\n\n<p>Ray Optics is the most rewarding chapter in this NEET Physics revision sheet \u2014 the mirror and lens formulas are simple, the sign convention is all you need to master, and 3\u20134 marks are almost guaranteed for prepared students.<\/p>\n\n\n\n<p>Ray optics is one of the most consistent chapters in NEET \u2014 mirror formula, lens formula, and refraction appear almost every year. This section of your Re-NEET 2026 Physics formula sheet is worth spending 20 minutes on the morning of the exam.<\/p>\n\n\n\n<p><strong>Formula 55:<\/strong> Mirror Formula \u2192 1\/f = 1\/v + 1\/u<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> f = focal length, v = image distance, u = object distance. Use sign convention: distances measured from pole. For concave mirror, f is negative; convex mirror, f is positive.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 56:<\/strong> Magnification (mirror) \u2192 m = \u2212v\/u = h\u2082\/h\u2081<\/p>\n\n\n\n<p><strong>Formula 57:<\/strong> Lens Formula \u2192 1\/f = 1\/v \u2212 1\/u<\/p>\n\n\n\n<p><strong>Formula 58:<\/strong> Magnification (lens) \u2192 m = v\/u<\/p>\n\n\n\n<p><strong>Formula 59:<\/strong> Lens Maker&#8217;s Formula \u2192 1\/f = (\u03bc \u2212 1)(1\/R\u2081 \u2212 1\/R\u2082)<\/p>\n\n\n\n<p><strong>Formula 60:<\/strong> Snell&#8217;s Law \u2192 \u03bc\u2081 sin\u03b8\u2081 = \u03bc\u2082 sin\u03b8\u2082 (or n\u2081 sin\u03b8\u2081 = n\u2082 sin\u03b8\u2082)<\/p>\n\n\n\n<p><strong>Formula 61:<\/strong> Refractive index \u2192 \u03bc = c\/v = sin i \/ sin r<\/p>\n\n\n\n<p><strong>Formula 62:<\/strong> Critical angle \u2192 sin C = 1\/\u03bc (for total internal reflection)<\/p>\n\n\n\n<p><strong>Formula 63:<\/strong> Power of lens \u2192 P = 1\/f (in metres); unit is Dioptre (D)<\/p>\n\n\n\n<p><strong>Formula 64:<\/strong> Lenses in contact \u2192 1\/F = 1\/f\u2081 + 1\/f\u2082 (or P = P\u2081 + P\u2082)<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> An object is placed 30 cm in front of a convex lens of focal length 10 cm. Find the image distance.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1\/f = 1\/v \u2212 1\/u \u2192 1\/10 = 1\/v \u2212 1\/(\u221230)<\/li>\n\n\n\n<li>1\/v = 1\/10 \u2212 1\/30 = 3\/30 \u2212 1\/30 = 2\/30<\/li>\n\n\n\n<li>v = <strong>15 cm<\/strong> (real image, on other side of lens)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-11-wave-optics-\u2605\u2605\">Chapter 11: Wave Optics \u2605\u2605<\/h2>\n\n\n\n<p>Wave Optics is a short but important part of this NEET Physics revision sheet. YDSE is the star \u2014 one formula, direct marks.<\/p>\n\n\n\n<p>Young&#8217;s Double Slit Experiment (YDSE) and diffraction are the standard questions from this chapter. The YDSE fringe width formula is one of the most frequently appearing Re-NEET Physics chapter formulas in previous NEET papers.<\/p>\n\n\n\n<p><strong>Formula 65:<\/strong> Fringe width in YDSE \u2192 \u03b2 = \u03bbD\/d<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> \u03b2 = fringe width, \u03bb = wavelength of light, D = distance from slits to screen, d = distance between slits.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 66:<\/strong> Position of bright fringes \u2192 y = n\u03bbD\/d (n = 0, 1, 2&#8230;)<\/p>\n\n\n\n<p><strong>Formula 67:<\/strong> Position of dark fringes \u2192 y = (2n\u22121)\u03bbD\/2d<\/p>\n\n\n\n<p><strong>Formula 68:<\/strong> Condition for constructive interference \u2192 \u0394 = n\u03bb<\/p>\n\n\n\n<p><strong>Formula 69:<\/strong> Condition for destructive interference \u2192 \u0394 = (2n\u22121)\u03bb\/2<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> In a YDSE, d = 1 mm, D = 1 m, \u03bb = 600 nm. Find fringe width.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u03b2 = \u03bbD\/d = (600\u00d710\u207b\u2079 \u00d7 1) \/ (1\u00d710\u207b\u00b3)<\/li>\n\n\n\n<li>= 600\u00d710\u207b\u2076 m = <strong>0.6 mm<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-12-modern-physics-\u2605\u2605\u2605\">Chapter 12: Modern Physics \u2605\u2605\u2605<\/h2>\n\n\n\n<p>Photoelectric effect, atomic models, radioactivity \u2014 very high weightage and mostly direct formula questions. For Re-NEET 2026 Physics preparation, Modern Physics alone can fetch you 3\u20135 marks with minimal effort if formulas are memorised. Use the <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-biology-last-15-days-revision\">Biology final days revision<\/a> to compare how a similar chapter-priority approach works for Biology.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"12-1-photoelectric-effect\">12.1 Photoelectric Effect<\/h3>\n\n\n\n<p><strong>Formula 70:<\/strong> Einstein&#8217;s photoelectric equation \u2192 KE_max = h\u03bd \u2212 \u03c6 = h\u03bd \u2212 h\u03bd\u2080<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Maximum kinetic energy of emitted electrons = energy of photon \u2212 work function. h = 6.626 \u00d7 10\u207b\u00b3\u2074 J\u00b7s<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 71:<\/strong> Energy of photon \u2192 E = h\u03bd = hc\/\u03bb<\/p>\n\n\n\n<p><strong>Formula 72:<\/strong> de Broglie wavelength \u2192 \u03bb = h\/mv = h\/p<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"12-2-bohrs-atomic-model\">12.2 Bohr&#8217;s Atomic Model<\/h3>\n\n\n\n<p><strong>Formula 73:<\/strong> Radius of nth orbit \u2192 r\u2099 = n\u00b2 \u00d7 0.529 \u00c5 (for hydrogen)<\/p>\n\n\n\n<p><strong>Formula 74:<\/strong> Energy of nth orbit \u2192 E\u2099 = \u221213.6\/n\u00b2 eV (for hydrogen)<\/p>\n\n\n\n<p><strong>Formula 75:<\/strong> Frequency of emitted photon \u2192 h\u03bd = E\u2082 \u2212 E\u2081<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"12-3-nuclear-physics-radioactivity\">12.3 Nuclear Physics &amp; Radioactivity<\/h3>\n\n\n\n<p><strong>Formula 76:<\/strong> Radioactive decay law \u2192 N = N\u2080 e^(\u2212\u03bbt)<\/p>\n\n\n\n<p><strong>Formula 77:<\/strong> Half-life \u2192 T\u00bd = 0.693\/\u03bb<\/p>\n\n\n\n<p><strong>Formula 78:<\/strong> Activity \u2192 A = \u03bbN = A\u2080 e^(\u2212\u03bbt)<\/p>\n\n\n\n<p><strong>Formula 79:<\/strong> Mass-energy equivalence \u2192 E = mc\u00b2 (c = 3 \u00d7 10\u2078 m\/s)<\/p>\n\n\n\n<p><strong>Formula 80:<\/strong> Binding energy per nucleon \u2192 BE = [Zm_p + Nm_n \u2212 M] \u00d7 931.5 MeV<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> The work function of a metal is 2 eV. What is the maximum KE of electrons when light of frequency 1.5 \u00d7 10\u00b9\u2075 Hz is incident? (h = 6.6 \u00d7 10\u207b\u00b3\u2074 J\u00b7s, 1 eV = 1.6 \u00d7 10\u207b\u00b9\u2079 J)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>E = h\u03bd = 6.6\u00d710\u207b\u00b3\u2074 \u00d7 1.5\u00d710\u00b9\u2075 = 9.9\u00d710\u207b\u00b9\u2079 J = 9.9\u00d710\u207b\u00b9\u2079 \/ 1.6\u00d710\u207b\u00b9\u2079 = 6.19 eV<\/li>\n\n\n\n<li>KE_max = 6.19 \u2212 2 = <strong>4.19 eV<\/strong><\/li>\n<\/ul>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example (Half-life):<\/strong> A radioactive sample has a half-life of 10 days. What fraction remains after 30 days?<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Number of half-lives = 30\/10 = 3<\/li>\n\n\n\n<li>Fraction remaining = (1\/2)\u00b3 = <strong>1\/8<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-13-electromagnetic-induction-ac-\u2605\u2605\u2605\">Chapter 13: Electromagnetic Induction &amp; AC \u2605\u2605\u2605<\/h2>\n\n\n\n<p>This is a chapter that students often underestimate. In this Re-NEET 2026 Physics formula sheet, it ranks among the highest-ROI sections \u2014 the formulas are concise and questions are almost always numerical.<\/p>\n\n\n\n<p>Faraday&#8217;s law, Lenz&#8217;s law, and AC circuit formulas are direct marks in NEET. This is another chapter where the Re-NEET Physics chapter formulas are almost directly lifted in MCQ options \u2014 students who know these formulas cold rarely get these questions wrong.<\/p>\n\n\n\n<p><strong>Formula 81:<\/strong> Faraday&#8217;s Law \u2192 EMF = \u2212d\u03a6\/dt = \u2212N(d\u03a6\/dt)<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Induced EMF = rate of change of magnetic flux. The negative sign means it opposes the change (Lenz&#8217;s Law).<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 82:<\/strong> Magnetic flux \u2192 \u03a6 = BAcos\u03b8<\/p>\n\n\n\n<p><strong>Formula 83:<\/strong> Motional EMF \u2192 \u03b5 = BLv<\/p>\n\n\n\n<p><strong>Formula 84:<\/strong> Transformer equation \u2192 V\u2081\/V\u2082 = N\u2081\/N\u2082 = I\u2082\/I\u2081<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Step-up transformer: N\u2082 &gt; N\u2081 \u2192 V\u2082 &gt; V\u2081. Step-down transformer: N\u2082 &lt; N\u2081.<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 85:<\/strong> Inductive reactance \u2192 X_L = \u03c9L = 2\u03c0fL<\/p>\n\n\n\n<p><strong>Formula 86:<\/strong> Capacitive reactance \u2192 X_C = 1\/\u03c9C = 1\/2\u03c0fC<\/p>\n\n\n\n<p><strong>Formula 87:<\/strong> Impedance in series LCR \u2192 Z = \u221a(R\u00b2 + (X_L \u2212 X_C)\u00b2)<\/p>\n\n\n\n<p><strong>Formula 88:<\/strong> Resonance condition \u2192 X_L = X_C \u2192 \u03c9\u2080 = 1\/\u221a(LC)<\/p>\n\n\n\n<p><strong>Formula 89:<\/strong> RMS values \u2192 V_rms = V\u2080\/\u221a2 ; I_rms = I\u2080\/\u221a2<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A transformer has 200 primary turns and 1000 secondary turns. If primary voltage is 220 V, find secondary voltage.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>V\u2081\/V\u2082 = N\u2081\/N\u2082 \u2192 220\/V\u2082 = 200\/1000<\/li>\n\n\n\n<li>V\u2082 = 220 \u00d7 1000\/200 = <strong>1100 V<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"chapter-14-simple-harmonic-motion-shm-\u2605\u2605\">Chapter 14: Simple Harmonic Motion (SHM) \u2605\u2605<\/h2>\n\n\n\n<p>For your NEET Physics revision sheet, SHM is a chapter to revise in one sitting \u2014 it&#8217;s compact but high-yield.<\/p>\n\n\n\n<p>SHM appears in 1\u20132 NEET questions yearly \u2014 mostly displacement, velocity, and time period. These Re-NEET 2026 Physics preparation formulas are short, clean, and very fast to answer if memorised.<\/p>\n\n\n\n<p><strong>Formula 90:<\/strong> Displacement in SHM \u2192 x = A sin(\u03c9t + \u03c6)<\/p>\n\n\n\n<p><strong>Formula 91:<\/strong> Velocity in SHM \u2192 v = \u03c9\u221a(A\u00b2 \u2212 x\u00b2)<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Maximum velocity is at x = 0 (mean position): v_max = A\u03c9<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 92:<\/strong> Acceleration in SHM \u2192 a = \u2212\u03c9\u00b2x<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>What it means:<\/strong> Acceleration is always directed toward mean position. Maximum at x = A (extreme): a_max = \u03c9\u00b2A<\/p>\n<\/blockquote>\n\n\n\n<p><strong>Formula 93:<\/strong> Time period of simple pendulum \u2192 T = 2\u03c0\u221a(L\/g)<\/p>\n\n\n\n<p><strong>Formula 94:<\/strong> Time period of spring-mass system \u2192 T = 2\u03c0\u221a(m\/k)<\/p>\n\n\n\n<p><strong>Formula 95:<\/strong> Total energy in SHM \u2192 E = \u00bdm\u03c9\u00b2A\u00b2 (constant)<\/p>\n\n\n\n<p><strong>\u270f\ufe0f Solved Example:<\/strong> A pendulum has a length of 1 m. Find its time period. (g = 10 m\/s\u00b2)<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>T = 2\u03c0\u221a(L\/g) = 2\u03c0\u221a(1\/10) = 2\u03c0 \u00d7 0.316 = <strong>1.99 s \u2248 2 s<\/strong><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"quick-reference-constants-you-must-know\">Quick Reference: Constants You Must Know<\/h2>\n\n\n\n<p>These values appear constantly across all NEET Physics important formulas 2026. Every formula in this Re-NEET 2026 Physics formula sheet uses at least one of these constants \u2014 knowing them removes any mid-exam hesitation. This is also the section of your NEET Physics revision sheet that you should glance at the morning of June 21. Know them by heart \u2014 do not waste time calculating constants during the exam.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Constant<\/th><th>Symbol<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Speed of light<\/td><td>c<\/td><td>3 \u00d7 10\u2078 m\/s<\/td><\/tr><tr><td>Planck&#8217;s constant<\/td><td>h<\/td><td>6.626 \u00d7 10\u207b\u00b3\u2074 J\u00b7s<\/td><\/tr><tr><td>Charge of electron<\/td><td>e<\/td><td>1.6 \u00d7 10\u207b\u00b9\u2079 C<\/td><\/tr><tr><td>Mass of electron<\/td><td>m\u2091<\/td><td>9.1 \u00d7 10\u207b\u00b3\u00b9 kg<\/td><\/tr><tr><td>Mass of proton<\/td><td>m\u209a<\/td><td>1.67 \u00d7 10\u207b\u00b2\u2077 kg<\/td><\/tr><tr><td>Boltzmann constant<\/td><td>k<\/td><td>1.38 \u00d7 10\u207b\u00b2\u00b3 J\/K<\/td><\/tr><tr><td>Universal gas constant<\/td><td>R<\/td><td>8.314 J\/mol\u00b7K<\/td><\/tr><tr><td>Permeability of free space<\/td><td>\u03bc\u2092<\/td><td>4\u03c0 \u00d7 10\u207b\u2077 T\u00b7m\/A<\/td><\/tr><tr><td>Permittivity of free space<\/td><td>\u03b5\u2092<\/td><td>8.85 \u00d7 10\u207b\u00b9\u00b2 C\u00b2\/N\u00b7m\u00b2<\/td><\/tr><tr><td>Coulomb&#8217;s constant<\/td><td>k<sub>B<\/sub><\/td><td>9 \u00d7 10\u2079 N\u00b7m\u00b2\/C\u00b2<\/td><\/tr><tr><td>Gravitational constant<\/td><td>G<\/td><td>6.67 \u00d7 10\u207b\u00b9\u00b9 N\u00b7m\u00b2\/kg\u00b2<\/td><\/tr><tr><td>1 eV<\/td><td>\u2014<\/td><td>1.6 \u00d7 10\u207b\u00b9\u2079 J<\/td><\/tr><tr><td>1 u (atomic mass unit)<\/td><td>\u2014<\/td><td>931.5 MeV\/c\u00b2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"last-day-revision-tip-from-k-square\">Last-Day Revision Tip from KSquare<\/h2>\n\n\n\n<p>Don&#8217;t try to re-read this entire sheet on June 20. Instead:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Day before (June 20):<\/strong> Cover Constants + Modern Physics + Current Electricity + Optics<\/li>\n\n\n\n<li><strong>Morning of June 21:<\/strong> 20-minute glance at SHM + Thermodynamics + Kinematics formulas only<\/li>\n\n\n\n<li><strong>At exam centre:<\/strong> Trust your preparation. Do not open notes at the gate.<\/li>\n<\/ul>\n\n\n\n<p>Physics in NEET rewards students who stay calm and apply formulas systematically. This Re-NEET 2026 Physics formula sheet \u2014 used as a NEET Physics revision sheet every morning \u2014 is the difference between hesitation and confidence at the exam centre.<\/p>\n\n\n\n<p>Make sure you also check the <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-exam-day-checklist\">Re-NEET 2026 exam day checklist<\/a> and the <a href=\"https:\/\/ksquareinstitute.in\/blog\/48-hours-before-re-neet-2026\">48-hour pre-exam guide<\/a> guide before June 21.<\/p>\n\n\n\n<p>You&#8217;ve got this. See you on the other side.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq-section\">FAQ Section<\/h2>\n\n\n\n<p><strong>Q: How many Physics questions come from Mechanics in NEET?<\/strong> <em>(Use this Re-NEET 2026 Physics formula sheet FAQ for exam-day clarity)<\/em><\/p>\n\n\n\n<p>A: Mechanics (Kinematics, Laws of Motion, Work-Energy, Rotational Motion, Gravitation) typically contributes 8\u201312 questions out of the 45 Physics questions in NEET. It is the single largest chunk from Class 11 Physics and must not be skipped.<\/p>\n\n\n\n<p><strong>Q: Which Physics chapter has the highest weightage in NEET?<\/strong> A: Historically, Current Electricity, Electrostatics, Ray Optics, and Modern Physics each contribute 3\u20135 questions and together form the core of the Physics section. Current Electricity is widely considered the single highest-scoring chapter because its questions are mostly direct formula-application.<\/p>\n\n\n\n<p><strong>Q: Is it enough to just memorise formulas for NEET Physics?<\/strong> A: No \u2014 but it&#8217;s a necessary starting point. NEET Physics tests formula application in slightly unfamiliar setups. You need to know the formula AND understand what each variable means. The solved examples in this sheet are structured exactly like NEET questions.<\/p>\n\n\n\n<p><strong>Q: What is the sign convention for mirrors and lenses in NEET?<\/strong> A: NEET follows the New Cartesian Sign Convention. The incident ray direction is positive (left to right). All distances are measured from the optical centre (lens) or pole (mirror). Object distance (u) is always negative for real objects. Image distance (v) is positive for real images in lenses, negative for real images in mirrors.<\/p>\n\n\n\n<p><strong>Q: Do I need to memorise all moments of inertia for NEET?<\/strong> A: Yes \u2014 specifically for solid sphere (2\/5 MR\u00b2), hollow sphere (2\/3 MR\u00b2), solid disc\/cylinder (1\/2 MR\u00b2), and ring (MR\u00b2). These four appear repeatedly in NEET rotational motion questions and rolling motion problems.<\/p>\n\n\n\n<p><strong>Q: What value of g should I use in NEET calculations?<\/strong> A: Unless specifically stated otherwise, use g = 10 m\/s\u00b2 in NEET numerical problems. Using 9.8 m\/s\u00b2 when the question expects 10 m\/s\u00b2 will give a slightly different answer and you may mark the wrong option.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>With June 21 just days away, your Re-NEET 2026 Physics formula sheet revision needs to be sharp, fast, and complete. Physics in NEET is not about memorising \u2014 it&#8217;s about knowing which formula to apply in under 30 seconds. This Re-NEET 2026 Physics formula sheet covers every high-weightage chapter with the exact formula, a plain-English [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5812,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[70,2,8],"tags":[],"class_list":["post-5811","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-physics","category-neet","category-study-tips"],"blocksy_meta":{"page_structure_type":"type-1","styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"_links":{"self":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/5811","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/comments?post=5811"}],"version-history":[{"count":1,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/5811\/revisions"}],"predecessor-version":[{"id":5813,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/5811\/revisions\/5813"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/media\/5812"}],"wp:attachment":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/media?parent=5811"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/categories?post=5811"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/tags?post=5811"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}