{"id":5894,"date":"2026-06-09T08:39:56","date_gmt":"2026-06-09T08:39:56","guid":{"rendered":"https:\/\/ksquareinstitute.in\/blog\/?p=5894"},"modified":"2026-06-09T08:39:57","modified_gmt":"2026-06-09T08:39:57","slug":"re-neet-2026-physics-quick-revision","status":"publish","type":"post","link":"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-physics-quick-revision\/","title":{"rendered":"Re-NEET 2026 Physics Quick Revision: 100 Must-Know NCERT Lines for June 21"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"432\" src=\"https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Quick-Revision-\u2014-100-Must-Know-NCERT-Lines-1024x432.jpg\" alt=\"Re-NEET 2026 Physics quick revision NCERT lines from Class 11 and 12 covering Mechanics, Optics and Modern Physics for June 21\" class=\"wp-image-5896\" srcset=\"https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Quick-Revision-\u2014-100-Must-Know-NCERT-Lines-1024x432.jpg 1024w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Quick-Revision-\u2014-100-Must-Know-NCERT-Lines-300x127.jpg 300w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Quick-Revision-\u2014-100-Must-Know-NCERT-Lines-768x324.jpg 768w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Quick-Revision-\u2014-100-Must-Know-NCERT-Lines-1536x648.jpg 1536w, https:\/\/ksquareinstitute.in\/blog\/wp-content\/uploads\/2026\/06\/Re-NEET-2026-Physics-Quick-Revision-\u2014-100-Must-Know-NCERT-Lines.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Physics is the section where most NEET students either gain a decisive edge or bleed marks unnecessarily. The difference almost always comes down to one thing: knowing the principle behind a formula. Students who know only the formula guess on conceptual questions. Students who know both the formula AND the NCERT Physics line for NEET 2026 that explains it answer with confidence. This Re-NEET 2026 Physics quick revision list gives you exactly that.<\/p>\n\n\n\n<p>This <strong>Re-NEET 2026 Physics quick revision<\/strong> list is your conceptual foundation for June 21. It gives you 100 verified lines from Class 11 and Class 12 NCERT Physics \u2014 definitions, laws, principles, and statements that have appeared in NEET questions repeatedly. No outside sources, no fabrication, pure NCERT.<\/p>\n\n\n\n<p>These are the NEET Physics NCERT important lines \u2014 the conceptual layer that makes the formula sheet complete. Keep your <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-physics-formula-sheet\">Re-NEET 2026 Physics formula sheet<\/a> beside you as you read \u2014 these lines are the conceptual layer on top of the formulas.<\/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-re-neet-2026-physics-quick-revision-list\">How to Use This Re-NEET 2026 Physics Quick Revision List<\/a><\/li><li><a href=\"#class-11-ncert-physics-50-re-neet-2026-physics-quick-revision-lines\">Class 11 NCERT Physics \u2014 50 Re-NEET 2026 Physics Quick Revision Lines<\/a><ul><li><a href=\"#physical-world-and-units-measurement\">Physical World and Units &amp; Measurement<\/a><\/li><li><a href=\"#motion-in-a-straight-line-plane\">Motion in a Straight Line &amp; Plane<\/a><\/li><li><a href=\"#laws-of-motion\">Laws of Motion<\/a><\/li><li><a href=\"#work-energy-and-power\">Work, Energy and Power<\/a><\/li><li><a href=\"#rotational-motion\">Rotational Motion<\/a><\/li><li><a href=\"#gravitation\">Gravitation<\/a><\/li><li><a href=\"#properties-of-matter\">Properties of Matter<\/a><\/li><li><a href=\"#thermal-properties-and-thermodynamics\">Thermal Properties and Thermodynamics<\/a><\/li><\/ul><\/li><li><a href=\"#class-12-ncert-physics-50-more-re-neet-2026-physics-quick-revision-lines\">Class 12 NCERT Physics \u2014 50 More Re-NEET 2026 Physics Quick Revision Lines<\/a><ul><li><a href=\"#electric-charges-and-fields\">Electric Charges and Fields<\/a><\/li><li><a href=\"#electrostatic-potential-and-capacitance\">Electrostatic Potential and Capacitance<\/a><\/li><li><a href=\"#current-electricity\">Current Electricity<\/a><\/li><li><a href=\"#magnetic-effects-of-current-and-moving-charges\">Magnetic Effects of Current and Moving Charges<\/a><\/li><li><a href=\"#electromagnetic-induction\">Electromagnetic Induction<\/a><\/li><li><a href=\"#alternating-current\">Alternating Current<\/a><\/li><li><a href=\"#ray-optics\">Ray Optics<\/a><\/li><li><a href=\"#wave-optics\">Wave Optics<\/a><\/li><li><a href=\"#modern-physics\">Modern Physics<\/a><\/li><\/ul><\/li><li><a href=\"#re-neet-2026-physics-quick-revision-schedule-for-these-100-lines\">Re-NEET 2026 Physics Quick Revision Schedule for These 100 Lines<\/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-re-neet-2026-physics-quick-revision-list\">How to Use This Re-NEET 2026 Physics Quick Revision List<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Read 10 lines, then close the page and mentally recall them<\/li>\n\n\n\n<li>Mark lines you hesitate on \u2014 revise those first tomorrow<\/li>\n\n\n\n<li>Do NOT try to cover all 100 in one sitting \u2014 split across 3 days<\/li>\n\n\n\n<li>Track which lines you miss repeatedly using the <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-mock-test-analysis\">Re-NEET 2026 mock test analysis<\/a> error log system<\/li>\n\n\n\n<li>On June 20, scan only the lines you marked as weak<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group has-border-color has-palette-color-1-border-color is-layout-flow wp-block-group-is-layout-flow\" style=\"border-width:1px;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-left-radius:6px;border-bottom-right-radius:6px;padding-top:10px;padding-right:10px;padding-bottom:10px;padding-left:10px\">\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"class-11-ncert-physics-50-re-neet-2026-physics-quick-revision-lines\">Class 11 NCERT Physics \u2014 50 Re-NEET 2026 Physics Quick Revision Lines<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-palette-color-1-color has-alpha-channel-opacity has-palette-color-1-background-color has-background is-style-wide\" style=\"margin-top:0;margin-bottom:0\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"physical-world-and-units-measurement\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Physical World and Units &amp; Measurement<\/mark><\/h3>\n\n\n\n<p>These lines form the foundation of your Re-NEET 2026 Physics quick revision \u2014 units and dimensions are tested every year.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Physics is the study of the basic laws of nature and their manifestation in different natural phenomena. This first line is itself one of the NEET Physics NCERT important lines that appears as an MCQ option.<\/li>\n\n\n\n<li><strong>Significant figures<\/strong> in a measured quantity include all certain digits plus one doubtful digit.<\/li>\n\n\n\n<li><strong>Dimensional analysis<\/strong> is used to check the correctness of equations, derive relationships between physical quantities, and convert units.<\/li>\n\n\n\n<li>The <strong>SI system<\/strong> has seven base units: metre (length), kilogram (mass), second (time), ampere (current), kelvin (temperature), mole (amount of substance), candela (luminous intensity).<\/li>\n\n\n\n<li><strong>Systematic errors<\/strong> are reproducible inaccuracies that are consistently in the same direction; <strong>random errors<\/strong> occur irregularly and have no fixed pattern.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"motion-in-a-straight-line-plane\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Motion in a Straight Line &amp; Plane<\/mark><\/h3>\n\n\n\n<p>Kinematics is the entry point of Re-NEET 2026 Physics chapter revision \u2014 projectile motion and relative velocity lines appear almost every year.<\/p>\n\n\n\n<ol start=\"6\" class=\"wp-block-list\">\n<li><strong>Displacement<\/strong> is a vector quantity \u2014 it has both magnitude and direction. <strong>Distance<\/strong> is a scalar quantity.<\/li>\n\n\n\n<li><strong>Average velocity<\/strong> = total displacement \/ total time. <strong>Average speed<\/strong> = total distance \/ total time.<\/li>\n\n\n\n<li><strong>Instantaneous velocity<\/strong> is the limit of average velocity as the time interval approaches zero \u2014 it equals the slope of the position-time graph at that instant.<\/li>\n\n\n\n<li><strong>Acceleration<\/strong> is the rate of change of velocity \u2014 it is a vector quantity.<\/li>\n\n\n\n<li>A <strong>projectile<\/strong> is an object given an initial velocity and then allowed to move under gravity alone. The horizontal component of velocity remains constant; only the vertical component changes.<\/li>\n\n\n\n<li>For a projectile, the <strong>range is maximum at 45\u00b0<\/strong> to the horizontal, and the maximum height is achieved when the initial velocity is directed vertically (90\u00b0).<\/li>\n\n\n\n<li><strong>Relative velocity<\/strong> of A with respect to B = velocity of A \u2212 velocity of B.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"laws-of-motion\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Laws of Motion<\/mark><\/h3>\n\n\n\n<p>Laws of Motion is a chapter where Re-NEET 2026 Physics quick revision pays off immediately \u2014 Newton&#8217;s laws and friction lines appear almost every year.<\/p>\n\n\n\n<ol start=\"13\" class=\"wp-block-list\">\n<li><strong>Newton&#8217;s First Law (Law of Inertia)<\/strong>: every body continues in its state of rest or of uniform motion in a straight line unless acted upon by an external unbalanced force.<\/li>\n\n\n\n<li><strong>Newton&#8217;s Second Law<\/strong>: the rate of change of momentum of a body is directly proportional to the applied force \u2014 F = dp\/dt = ma.<\/li>\n\n\n\n<li><strong>Newton&#8217;s Third Law<\/strong>: for every action, there is an equal and opposite reaction. Forces always act in pairs on two different bodies.<\/li>\n\n\n\n<li><strong>Impulse<\/strong> = Force \u00d7 time = change in momentum (\u0394p). It is a vector quantity.<\/li>\n\n\n\n<li><strong>Law of Conservation of Linear Momentum<\/strong>: in the absence of an external force, the total momentum of a system remains constant.<\/li>\n\n\n\n<li><strong>Static friction<\/strong> is always equal to the applied force until it reaches its maximum value (limiting friction). <strong>Kinetic friction<\/strong> is slightly less than limiting static friction.<\/li>\n\n\n\n<li>The coefficient of kinetic friction (\u03bc\u2096) is always <strong>less than<\/strong> the coefficient of static friction (\u03bc\u209b).<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"work-energy-and-power\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Work, Energy and Power<\/mark><\/h3>\n\n\n\n<p>Work, Energy and Power is a chapter where NEET Physics NCERT important lines and numericals are equally represented \u2014 know both the theorem statements and the formulas.<\/p>\n\n\n\n<ol start=\"20\" class=\"wp-block-list\">\n<li><strong>Work done<\/strong> by a constant force = F \u00b7 d \u00b7 cos\u03b8. Work is a scalar quantity.<\/li>\n\n\n\n<li>Work done by a <strong>conservative force<\/strong> is path-independent \u2014 it depends only on the initial and final positions.<\/li>\n\n\n\n<li><strong>Kinetic energy<\/strong> (KE) = \u00bdmv\u00b2. <strong>Potential energy<\/strong> (PE) = mgh (gravitational).<\/li>\n\n\n\n<li><strong>Work-Energy Theorem<\/strong>: the net work done on an object equals the change in its kinetic energy \u2014 W_net = \u0394KE.<\/li>\n\n\n\n<li><strong>Conservation of mechanical energy<\/strong>: in the absence of non-conservative forces, the total mechanical energy (KE + PE) of a system remains constant.<\/li>\n\n\n\n<li><strong>Power<\/strong> = work done per unit time = F\u00b7v. Its SI unit is the watt (W).<\/li>\n\n\n\n<li><strong>Elastic collision<\/strong>: both momentum and kinetic energy are conserved. <strong>Inelastic collision<\/strong>: only momentum is conserved; kinetic energy is not.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"rotational-motion\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Rotational Motion<\/mark><\/h3>\n\n\n\n<p>The NEET Physics NCERT important lines from Rotational Motion are the most numerically tested in this section \u2014 know the MI values and rolling motion statements cold.<\/p>\n\n\n\n<ol start=\"27\" class=\"wp-block-list\">\n<li><strong>Torque (\u03c4)<\/strong> = r \u00d7 F = rF sin\u03b8. It is the rotational analogue of force.<\/li>\n\n\n\n<li><strong>Angular momentum (L)<\/strong> = I\u03c9 = r \u00d7 p. <strong>Conservation of angular momentum<\/strong>: L remains constant when net external torque = 0.<\/li>\n\n\n\n<li><strong>Moment of inertia (I)<\/strong> depends on the mass of the body and the distribution of mass about the axis of rotation.<\/li>\n\n\n\n<li><strong>Parallel axis theorem<\/strong>: I = I_cm + Md\u00b2, where d is the distance between the parallel axes.<\/li>\n\n\n\n<li><strong>Perpendicular axis theorem<\/strong> (for flat lamina): I_z = I_x + I_y.<\/li>\n\n\n\n<li>For <strong>rolling without slipping<\/strong>, the velocity at the point of contact with the ground is zero; the velocity at the top is 2v.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"gravitation\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Gravitation<\/mark><\/h3>\n\n\n\n<p>Gravitation is a high-ROI chapter in any Re-NEET 2026 Physics quick revision session \u2014 short, predictable, and mostly direct NCERT recall.<\/p>\n\n\n\n<ol start=\"33\" class=\"wp-block-list\">\n<li><strong>Newton&#8217;s Law of Universal Gravitation<\/strong>: every particle attracts every other particle with a force F = Gm\u2081m\u2082\/r\u00b2. G = 6.67 \u00d7 10\u207b\u00b9\u00b9 N m\u00b2 kg\u207b\u00b2.<\/li>\n\n\n\n<li><strong>Acceleration due to gravity (g)<\/strong> = GM\/R\u00b2 at the surface. It decreases both above and below the surface of the Earth.<\/li>\n\n\n\n<li><strong>Escape velocity<\/strong> from Earth&#8217;s surface = \u221a(2gR) \u2248 11.2 km\/s.<\/li>\n\n\n\n<li><strong>Orbital velocity<\/strong> of a satellite close to the Earth&#8217;s surface \u2248 \u221a(gR) \u2248 7.9 km\/s.<\/li>\n\n\n\n<li><strong>Geostationary satellites<\/strong> orbit at approximately 36,000 km above the equator, have a time period of 24 hours, and appear stationary relative to the Earth.<\/li>\n\n\n\n<li><strong>Kepler&#8217;s Third Law<\/strong>: the square of the orbital period is proportional to the cube of the semi-major axis \u2014 T\u00b2 \u221d r\u00b3.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"properties-of-matter\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Properties of Matter<\/mark><\/h3>\n\n\n\n<p>Properties of Matter lines are part of Re-NEET 2026 Physics quick revision that students often skip \u2014 Bernoulli&#8217;s principle and Hooke&#8217;s law appear consistently.<\/p>\n\n\n\n<ol start=\"39\" class=\"wp-block-list\">\n<li><strong>Stress<\/strong> = force per unit area (N\/m\u00b2). <strong>Strain<\/strong> = change in dimension \/ original dimension (dimensionless).<\/li>\n\n\n\n<li><strong>Hooke&#8217;s Law<\/strong>: within the elastic limit, stress is directly proportional to strain. The proportionality constant is called the <strong>modulus of elasticity<\/strong>.<\/li>\n\n\n\n<li><strong>Young&#8217;s modulus (Y)<\/strong> = longitudinal stress \/ longitudinal strain. It is a property of the material.<\/li>\n\n\n\n<li><strong>Surface tension<\/strong> is the property of a liquid surface by which it tends to contract to minimum area \u2014 it arises due to cohesive forces between liquid molecules.<\/li>\n\n\n\n<li><strong>Bernoulli&#8217;s Principle<\/strong>: for a streamlined flow of an ideal fluid, the sum of pressure, kinetic energy per unit volume, and potential energy per unit volume remains constant \u2014 P + \u00bd\u03c1v\u00b2 + \u03c1gh = constant.<\/li>\n\n\n\n<li><strong>Viscosity<\/strong> is the property of a fluid by which it resists relative motion between its layers. It is the fluid analogue of friction.<\/li>\n\n\n\n<li><strong>Stokes&#8217; Law<\/strong>: the viscous force on a sphere moving through a fluid = 6\u03c0\u03b7rv.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"thermal-properties-and-thermodynamics\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Thermal Properties and Thermodynamics<\/mark><\/h3>\n\n\n\n<p>For Re-NEET 2026 Physics quick revision, thermodynamics lines reward students who understand the law statements \u2014 not just the formulas.<\/p>\n\n\n\n<ol start=\"46\" class=\"wp-block-list\">\n<li><strong>Zeroth Law of Thermodynamics<\/strong>: if two systems are each in thermal equilibrium with a third system, they are in thermal equilibrium with each other \u2014 this is the basis of temperature measurement.<\/li>\n\n\n\n<li><strong>First Law of Thermodynamics<\/strong>: \u0394U = Q \u2212 W (energy is conserved \u2014 heat added to a system = increase in internal energy + work done by the system).<\/li>\n\n\n\n<li><strong>Second Law of Thermodynamics<\/strong>: heat cannot spontaneously flow from a cold body to a hot body. Entropy of an isolated system always increases.<\/li>\n\n\n\n<li><strong>Isothermal process<\/strong>: temperature is constant (\u0394T = 0, \u0394U = 0 for ideal gas). <strong>Adiabatic process<\/strong>: no heat exchange (Q = 0).<\/li>\n\n\n\n<li><strong>Specific heat capacity<\/strong> is the heat required per unit mass per degree rise in temperature. Water has an unusually high specific heat capacity (4186 J kg\u207b\u00b9 K\u207b\u00b9).<\/li>\n<\/ol>\n<\/div>\n\n\n\n<div class=\"wp-block-group has-border-color has-palette-color-1-border-color is-layout-flow wp-block-group-is-layout-flow\" style=\"border-width:1px;border-top-left-radius:6px;border-top-right-radius:6px;border-bottom-left-radius:6px;border-bottom-right-radius:6px;padding-top:10px;padding-right:10px;padding-bottom:10px;padding-left:10px\">\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"class-12-ncert-physics-50-more-re-neet-2026-physics-quick-revision-lines\">Class 12 NCERT Physics \u2014 50 More Re-NEET 2026 Physics Quick Revision Lines<\/h2>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"electric-charges-and-fields\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Electric Charges and Fields<\/mark><\/h3>\n\n\n\n<p>This chapter opens the Class 12 Re-NEET 2026 Physics chapter revision section \u2014 Coulomb&#8217;s law, Gauss&#8217;s law, and electric field lines are the three most tested topics.<\/p>\n\n\n\n<ol start=\"51\" class=\"wp-block-list\">\n<li><strong>Coulomb&#8217;s Law<\/strong>: the electrostatic force between two point charges = kq\u2081q\u2082\/r\u00b2. k = 9 \u00d7 10\u2079 N m\u00b2 C\u207b\u00b2. It is an inverse square law.<\/li>\n\n\n\n<li><strong>Electric field (E)<\/strong> = force per unit positive test charge = F\/q. Its SI unit is N\/C or V\/m.<\/li>\n\n\n\n<li><strong>Gauss&#8217;s Law<\/strong>: the total electric flux through any closed surface = Q_enclosed\/\u03b5\u2092. \u03b5\u2092 = 8.85 \u00d7 10\u207b\u00b9\u00b2 C\u00b2 N\u207b\u00b9 m\u207b\u00b2.<\/li>\n\n\n\n<li><strong>Electric field inside a conductor<\/strong> at electrostatic equilibrium is zero. Any excess charge resides on the surface.<\/li>\n\n\n\n<li><strong>Electric dipole moment (p)<\/strong> = q \u00d7 2a. Its direction is from negative to positive charge.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"electrostatic-potential-and-capacitance\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Electrostatic Potential and Capacitance<\/mark><\/h3>\n\n\n\n<p>Capacitance lines complete the Electrostatics cluster in this Re-NEET 2026 Physics quick revision list \u2014 energy stored and capacitor combinations are standard MCQ sources.<\/p>\n\n\n\n<ol start=\"56\" class=\"wp-block-list\">\n<li><strong>Electric potential<\/strong> at a point = work done per unit positive charge in bringing a test charge from infinity to that point. It is a scalar quantity.<\/li>\n\n\n\n<li><strong>Equipotential surfaces<\/strong>: surfaces on which the potential is the same everywhere \u2014 no work is done moving a charge along an equipotential surface.<\/li>\n\n\n\n<li><strong>Capacitance (C)<\/strong> = Q\/V. For a parallel plate capacitor: C = \u03b5\u2092A\/d. With dielectric: C = K\u03b5\u2092 A\/d.<\/li>\n\n\n\n<li><strong>Energy stored in a capacitor<\/strong> = \u00bdCV\u00b2 = Q\u00b2\/2C = QV\/2.<\/li>\n\n\n\n<li>Capacitors in <strong>series<\/strong>: 1\/C = 1\/C\u2081 + 1\/C\u2082. In <strong>parallel<\/strong>: C = C\u2081 + C\u2082.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"current-electricity\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Current Electricity<\/mark><\/h3>\n\n\n\n<p>Current Electricity is the single highest-scoring Class 12 chapter in any Re-NEET 2026 Physics last minute revision \u2014 Kirchhoff&#8217;s laws and Wheatstone bridge are essential.<\/p>\n\n\n\n<ol start=\"61\" class=\"wp-block-list\">\n<li><strong>Ohm&#8217;s Law<\/strong>: V = IR. It holds when temperature and other physical conditions are constant.<\/li>\n\n\n\n<li><strong>Resistivity (\u03c1)<\/strong>: R = \u03c1L\/A. Resistivity of a metal increases with temperature; resistivity of a semiconductor decreases with temperature.<\/li>\n\n\n\n<li><strong>Kirchhoff&#8217;s Current Law (KCL)<\/strong>: the sum of currents entering a junction = sum of currents leaving it (conservation of charge).<\/li>\n\n\n\n<li><strong>Kirchhoff&#8217;s Voltage Law (KVL)<\/strong>: the algebraic sum of all EMFs and voltage drops in any closed loop = zero (conservation of energy).<\/li>\n\n\n\n<li><strong>Wheatstone bridge<\/strong> is balanced when P\/Q = R\/S \u2014 no current flows through the galvanometer at balance.<\/li>\n\n\n\n<li><strong>Power dissipated<\/strong> in a resistor = P = VI = I\u00b2R = V\u00b2\/R.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"magnetic-effects-of-current-and-moving-charges\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Magnetic Effects of Current and Moving Charges<\/mark><\/h3>\n\n\n\n<p>For NCERT Physics lines for NEET 2026, this chapter has the most directly-quoted statements \u2014 Biot-Savart, Ampere&#8217;s law, and cyclotron lines are consistently tested.<\/p>\n\n\n\n<ol start=\"67\" class=\"wp-block-list\">\n<li><strong>Biot-Savart Law<\/strong>: the magnetic field due to a current element dI at a point = \u03bc\u2092I(dl \u00d7 r\u0302)\/4\u03c0r\u00b2. Direction determined by right-hand rule.<\/li>\n\n\n\n<li><strong>Ampere&#8217;s Circuital Law<\/strong>: the line integral of B around a closed path = \u03bc\u2092 \u00d7 (total current enclosed). \u03bc\u2092 = 4\u03c0 \u00d7 10\u207b\u2077 T m A\u207b\u00b9.<\/li>\n\n\n\n<li><strong>Magnetic field inside a solenoid<\/strong> = \u03bc\u2092nI, where n = number of turns per unit length. It is uniform inside and zero outside.<\/li>\n\n\n\n<li><strong>Force on a moving charge in a magnetic field<\/strong>: F = qv \u00d7 B = qvB sin\u03b8. This force is always perpendicular to velocity \u2014 it does no work.<\/li>\n\n\n\n<li><strong>Lorentz force<\/strong> = electric force + magnetic force = q(E + v \u00d7 B).<\/li>\n\n\n\n<li>A <strong>cyclotron<\/strong> accelerates charged particles in a spiral path using alternating electric fields and a uniform magnetic field. The cyclotron frequency = qB\/2\u03c0m \u2014 it is independent of speed.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"electromagnetic-induction\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Electromagnetic Induction<\/mark><\/h3>\n\n\n\n<p>Electromagnetic Induction carries 2\u20133 questions every NEET \u2014 these lines are the core of Re-NEET 2026 Physics last minute revision for Class 12.<\/p>\n\n\n\n<ol start=\"73\" class=\"wp-block-list\">\n<li><strong>Faraday&#8217;s First Law<\/strong>: whenever the magnetic flux through a circuit changes, an EMF is induced in the circuit.<\/li>\n\n\n\n<li><strong>Faraday&#8217;s Second Law<\/strong>: the magnitude of induced EMF = rate of change of magnetic flux = \u2212d\u03a6\/dt.<\/li>\n\n\n\n<li><strong>Lenz&#8217;s Law<\/strong>: the direction of the induced current is always such as to oppose the change that caused it \u2014 this is a consequence of conservation of energy.<\/li>\n\n\n\n<li><strong>Motional EMF<\/strong> = BLv, where B is the magnetic field, L is the length of the conductor, and v is the velocity.<\/li>\n\n\n\n<li><strong>Self-inductance (L)<\/strong>: the property of a coil by which it opposes any change in the current through it. EMF = \u2212L(dI\/dt).<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"alternating-current\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Alternating Current<\/mark><\/h3>\n\n\n\n<p>AC circuits are part of Re-NEET 2026 Physics last minute revision that many students skip \u2014 don&#8217;t. RMS values, resonance condition, and power factor appear frequently.<\/p>\n\n\n\n<ol start=\"78\" class=\"wp-block-list\">\n<li><strong>RMS value<\/strong> of AC: V_rms = V\u2080\/\u221a2; I_rms = I\u2080\/\u221a2. RMS values are equivalent to the DC values that produce the same heating effect.<\/li>\n\n\n\n<li><strong>Inductive reactance<\/strong>: X_L = \u03c9L = 2\u03c0fL. It increases with frequency.<\/li>\n\n\n\n<li><strong>Capacitive reactance<\/strong>: X_C = 1\/\u03c9C = 1\/2\u03c0fC. It decreases with frequency.<\/li>\n\n\n\n<li><strong>Impedance (Z)<\/strong> in a series LCR circuit = \u221a[R\u00b2 + (X_L \u2212 X_C)\u00b2].<\/li>\n\n\n\n<li><strong>Resonance<\/strong> in an LCR circuit occurs when X_L = X_C \u2192 \u03c9\u2080 = 1\/\u221a(LC). At resonance, impedance is minimum and current is maximum.<\/li>\n\n\n\n<li><strong>Power factor<\/strong> = cos\u03c6 = R\/Z. For a pure resistor: cos\u03c6 = 1. For a pure inductor or capacitor: cos\u03c6 = 0.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"ray-optics\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Ray Optics<\/mark><\/h3>\n\n\n\n<p>Ray Optics is one of the highest-scoring sections for Re-NEET 2026 Physics chapter revision \u2014 mirror formula, lens formula, and Snell&#8217;s law are tested in almost every NEET paper.<\/p>\n\n\n\n<ol start=\"84\" class=\"wp-block-list\">\n<li><strong>Laws of Reflection<\/strong>: angle of incidence = angle of reflection; the incident ray, reflected ray, and normal are all in the same plane.<\/li>\n\n\n\n<li><strong>Mirror formula<\/strong>: 1\/f = 1\/v + 1\/u. <strong>Sign convention<\/strong>: distances measured from the pole; direction of incident ray is positive.<\/li>\n\n\n\n<li><strong>Snell&#8217;s Law of Refraction<\/strong>: n\u2081 sin\u03b8\u2081 = n\u2082 sin\u03b8\u2082. The incident ray, refracted ray, and normal are coplanar.<\/li>\n\n\n\n<li><strong>Total Internal Reflection<\/strong> occurs when light travels from a denser to a rarer medium and the angle of incidence exceeds the <strong>critical angle<\/strong> (sinC = 1\/n).<\/li>\n\n\n\n<li><strong>Lens formula<\/strong>: 1\/f = 1\/v \u2212 1\/u. <strong>Power of a lens (P)<\/strong> = 1\/f (in metres); unit is dioptre (D).<\/li>\n\n\n\n<li><strong>Lens Maker&#8217;s Formula<\/strong>: 1\/f = (n \u2212 1)(1\/R\u2081 \u2212 1\/R\u2082).<\/li>\n\n\n\n<li>For two thin lenses in contact: 1\/F = 1\/f\u2081 + 1\/f\u2082, or P = P\u2081 + P\u2082.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"wave-optics\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Wave Optics<\/mark><\/h3>\n\n\n\n<p>Wave Optics has 2\u20133 NEET Physics NCERT important lines that appear almost every year \u2014 Huygen&#8217;s principle, YDSE fringe width, and diffraction.<\/p>\n\n\n\n<ol start=\"91\" class=\"wp-block-list\">\n<li><strong>Huygen&#8217;s Principle<\/strong>: every point on a wavefront acts as a source of secondary wavelets; the new wavefront is the forward envelope of all secondary wavelets.<\/li>\n\n\n\n<li><strong>Condition for constructive interference<\/strong>: path difference = n\u03bb (n = 0, 1, 2&#8230;). <strong>Destructive interference<\/strong>: path difference = (2n\u22121)\u03bb\/2.<\/li>\n\n\n\n<li><strong>Fringe width in YDSE<\/strong>: \u03b2 = \u03bbD\/d, where D = distance to screen, d = slit separation, \u03bb = wavelength.<\/li>\n\n\n\n<li><strong>Diffraction<\/strong> is the bending of waves around obstacles or through apertures. Diffraction effects are significant when the slit width is comparable to the wavelength.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"modern-physics\"><mark style=\"background-color:#2871fa29\" class=\"has-inline-color has-palette-color-1-color\">Modern Physics<\/mark><\/h3>\n\n\n\n<p>Modern Physics is the final chapter in this Re-NEET 2026 Physics quick revision list \u2014 and one of the highest-scoring. Direct NCERT recall, no complex derivations.<\/p>\n\n\n\n<ol start=\"95\" class=\"wp-block-list\">\n<li><strong>Photoelectric effect<\/strong>: electrons are emitted from a metal surface when light of frequency above the threshold frequency falls on it. Einstein&#8217;s equation: KE_max = h\u03bd \u2212 \u03c6.<\/li>\n\n\n\n<li><strong>de Broglie wavelength<\/strong>: \u03bb = h\/mv = h\/p. Every moving particle has an associated matter wave.<\/li>\n\n\n\n<li><strong>Bohr&#8217;s model of hydrogen<\/strong>: the radius of nth orbit = n\u00b2 \u00d7 0.529 \u00c5; energy of nth orbit = \u221213.6\/n\u00b2 eV.<\/li>\n\n\n\n<li><strong>Radioactive decay law<\/strong>: N = N\u2080e^(\u2212\u03bbt). <strong>Half-life<\/strong> T\u00bd = 0.693\/\u03bb.<\/li>\n\n\n\n<li><strong>Mass-energy equivalence<\/strong>: E = mc\u00b2. The mass defect in a nucleus is converted to binding energy. 1 u = 931.5 MeV.<\/li>\n\n\n\n<li><strong>Nuclear fission<\/strong>: a heavy nucleus splits into two lighter nuclei with release of enormous energy. <strong>Nuclear fusion<\/strong>: two light nuclei combine to form a heavier nucleus \u2014 it powers the Sun and requires very high temperature.<\/li>\n<\/ol>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"re-neet-2026-physics-quick-revision-schedule-for-these-100-lines\">Re-NEET 2026 Physics Quick Revision Schedule for These 100 Lines<\/h2>\n\n\n\n<p><strong>Now\u2013June 12:<\/strong> Read all 100 lines once. Mark every line you hesitate on. <strong>June 13\u201317:<\/strong> Revise only marked lines. Pay special attention to Modern Physics (lines 95\u2013100) and Electrostatics (lines 51\u201360). <strong>June 18\u201319:<\/strong> Re-NEET 2026 Physics last minute revision pass \u2014 all 100 lines in under 50 minutes. <strong>June 20 (night before):<\/strong> Final Re-NEET 2026 Physics last minute revision \u2014 scan lines 51\u2013100 (Class 12) only, 20 minutes maximum.<\/p>\n\n\n\n<p>Pair this list with your <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-biology-quick-revision\">Re-NEET 2026 Biology quick revision<\/a> and <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-chemistry-quick-revision\">Re-NEET 2026 Chemistry quick revision<\/a> for a complete three-subject NCERT revision system before June 21.<\/p>\n\n\n\n<p>Your <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-revision-vs-practice-papers\">Re-NEET 2026 revision schedule<\/a> should dedicate one full day to these Physics lines in the final week. Also check the <a href=\"https:\/\/ksquareinstitute.in\/blog\/re-neet-2026-time-management-strategy\">Re-NEET 2026 time management strategy<\/a> for how to handle Physics in the exam hall \u2014 it has the specific time allocation and attempt-order guidance for Physics specifically.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq-section\">FAQ Section<\/h2>\n\n\n\n<p><strong>Q: Are these verified NCERT Physics lines for NEET 2026?<\/strong> A: Yes. Every line is sourced exclusively from Class 11 and Class 12 NCERT Physics textbooks. No reference books, no coaching material. Every line here is a verified NCERT Physics line for NEET 2026 \u2014 NEET conceptual questions are drawn directly from NCERT language.<\/p>\n\n\n\n<p><strong>Q: Which chapters have the most NCERT Physics lines for NEET 2026 that appear in MCQs?<\/strong> A: Electrostatics (3\u20134 questions), Current Electricity (3\u20134 questions), Ray Optics (3\u20134 questions), Modern Physics (3\u20134 questions), and Magnetism (2\u20133 questions) are the most consistently tested chapters. These chapters cover lines 51\u2013100 in this list \u2014 Class 12 is the priority.<\/p>\n\n\n\n<p><strong>Q: How many NCERT Physics lines for NEET 2026 appear directly in the paper?<\/strong> A: Roughly 40\u201345% of NEET Physics questions are conceptual\/theory-based (testing statements, laws, and definitions), and 55\u201360% are numerical. This list covers the conceptual half \u2014 your formula sheet covers the numerical half.<\/p>\n\n\n\n<p><strong>Q: Which Class should I prioritise for Re-NEET 2026 Physics chapter revision?<\/strong> A: Both carry approximately equal weightage (roughly 22\u201323 questions each). Class 12 Physics tends to have more direct NCERT statement questions, especially in Electrostatics, Magnetism, and Modern Physics. Class 11 Mechanics (lines 13\u201332) is heavier on numericals.<\/p>\n\n\n\n<p><strong>Q: What is the best Re-NEET 2026 Physics chapter revision approach for the last night?<\/strong> A: Only lines 51\u2013100 (Class 12), and only as a quick 20-minute scan. Deep reading the night before disrupts sleep. Recognition, not memorisation, is the goal at that point.<\/p>\n\n\n\n<p><strong>Q: What should I do if I find a Physics conceptual question in the exam that I don&#8217;t know?<\/strong> A: Mark it, skip it immediately, and return in Round 2. Do not spend more than 90 seconds on any conceptual Physics question in Round 1. Most Physics concepts you don&#8217;t recognise immediately will not become clearer by staring \u2014 come back with fresh eyes after completing Biology and Chemistry.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Physics is the section where most NEET students either gain a decisive edge or bleed marks unnecessarily. The difference almost always comes down to one thing: knowing the principle behind a formula. Students who know only the formula guess on conceptual questions. Students who know both the formula AND the NCERT Physics line for NEET [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5896,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[70,2,8],"tags":[2549,1448,2545,2548,952,2547,1969,2362,2004,2546],"class_list":["post-5894","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-physics","category-neet","category-study-tips","tag-ncert-important-lines-physics","tag-ncert-physics-neet","tag-neet-2026-physics-lines","tag-neet-physics-june-21","tag-neet-physics-revision","tag-physics-quick-revision-neet","tag-re-neet-2026","tag-re-neet-2026-physics","tag-re-neet-2026-preparation","tag-re-neet-physics-preparation"],"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\/5894","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=5894"}],"version-history":[{"count":2,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/5894\/revisions"}],"predecessor-version":[{"id":5897,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/posts\/5894\/revisions\/5897"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/media\/5896"}],"wp:attachment":[{"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/media?parent=5894"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/categories?post=5894"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ksquareinstitute.in\/blog\/wp-json\/wp\/v2\/tags?post=5894"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}