Re-NEET 2026 Physics Formula Sheet: All Formulas You Must Revise Before June 21

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 โ€” it’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 how to use it โ€” not just what it looks like. Think of this as your NEET Physics revision sheet โ€” one page, all chapters, exam-ready.

Re-NEET 2026 Physics formula sheet covering all high-weightage chapters with solved examples

Bookmark this page. Come back to it every morning before June 21. Pair this with your Re-NEET 2026 Chemistry formula sheet for a full science revision block.

How to Use This Formula Sheet

  • Read the plain-English explanation first โ€” it tells you when to apply the formula
  • Study the solved example โ€” NEET questions are almost always structured like these
  • Don’t just read โ€” write each formula once in your notebook after reading it
  • Prioritise chapters marked โ˜…โ˜…โ˜… (highest NEET weightage)
  • Use this Re-NEET 2026 Physics formula sheet alongside mock tests โ€” apply each formula immediately after revising it
  • This NEET Physics revision sheet is structured by chapter weight โ€” spend most time on โ˜…โ˜…โ˜… chapters

Chapter Priority Guide for This Formula Sheet

Not all chapters in this Re-NEET 2026 Physics formula sheet deserve equal time. Here’s how to prioritise your NEET Physics revision sheet sessions based on chapter weight and formula complexity:

ChapterNEET WeightageFormula DensityPriority
Current ElectricityVery High (4โ€“5 Qs)Mediumโ˜…โ˜…โ˜… Revise first
ElectrostaticsHigh (3โ€“4 Qs)Mediumโ˜…โ˜…โ˜… Revise first
Ray OpticsHigh (3โ€“4 Qs)Lowโ˜…โ˜…โ˜… Easy marks
Modern PhysicsHigh (3โ€“4 Qs)Lowโ˜…โ˜…โ˜… Direct formulas
Mechanics (Kinematics + Laws + WEP)Very High (5โ€“6 Qs)Highโ˜…โ˜…โ˜… Foundation
Rotational MotionMedium (2โ€“3 Qs)Highโ˜…โ˜… After above
Magnetic EffectsMedium (2โ€“3 Qs)Mediumโ˜…โ˜… Important
ThermodynamicsMedium (2โ€“3 Qs)Mediumโ˜…โ˜… Don’t skip
EMI & ACMedium (2 Qs)Mediumโ˜…โ˜… High ROI
Wave OpticsLow-Medium (1โ€“2 Qs)Lowโ˜… Quick revision
GravitationLow-Medium (1โ€“2 Qs)Lowโ˜… Direct formulas
SHMLow (1โ€“2 Qs)Lowโ˜… Last

How to use this table for Re-NEET 2026 Physics preparation:

  • If you have 3 days left: cover โ˜…โ˜…โ˜… chapters only
  • If you have 5+ days: cover all chapters in order
  • This NEET Physics revision sheet is most effective when you solve 1โ€“2 MCQs immediately after each formula block

The NEET Physics important formulas 2026 that appear most directly in MCQ options are from Current Electricity, Ray Optics, and Modern Physics โ€” which is why this Re-NEET 2026 Physics formula sheet front-loads the most formula-dense chapters first. Use this alongside the final weeks revision plan guide to build a day-by-day schedule around these chapters.

Chapter 1: Kinematics โ˜…โ˜…โ˜…

Kinematics deals with motion โ€” 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 โ€” these formulas appear in almost every mock test.

Your Re-NEET 2026 complete study plan also recommends starting with Mechanics in the final sprint.

1.1 Equations of Motion (Uniformly Accelerated Motion)

Formula 1: v = u + at

What it means: Final velocity = initial velocity + (acceleration ร— time). Use this when you know u, a, t and need v.

Formula 2: s = ut + ยฝatยฒ

What it means: Displacement = initial velocity ร— time + half of acceleration ร— time squared. Use this when you need distance covered.

Formula 3: vยฒ = uยฒ + 2as

What it means: Final velocity squared = initial velocity squared + 2 ร— acceleration ร— displacement. Use this when time is NOT given.

Formula 4: s = (u + v)/2 ร— t

What it means: Displacement = average velocity ร— time. Quick formula when you have both u and v.

โœ๏ธ Solved Example: A car starts from rest and accelerates at 4 m/sยฒ for 5 seconds. Find the distance covered.

  • u = 0 (starts from rest), a = 4 m/sยฒ, t = 5 s
  • s = ut + ยฝatยฒ = 0 ร— 5 + ยฝ ร— 4 ร— 25 = 50 m

1.2 Projectile Motion

Formula 5: Time of flight โ†’ T = 2u sinฮธ / g

Formula 6: Maximum height โ†’ H = uยฒ sinยฒฮธ / 2g

Formula 7: Horizontal range โ†’ R = uยฒ sin2ฮธ / g

What it means: For maximum range, ฮธ = 45ยฐ. sin 2ฮธ is maximum (= 1) at 2ฮธ = 90ยฐ.

โœ๏ธ Solved Example: A ball is projected at 20 m/s at 30ยฐ to the horizontal. Find the maximum height. (g = 10 m/sยฒ)

  • H = uยฒ sinยฒฮธ / 2g = (20)ยฒ ร— sinยฒ30ยฐ / (2 ร— 10)
  • = 400 ร— (0.5)ยฒ / 20 = 400 ร— 0.25 / 20 = 100/20 = 5 m
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Chapter 2: Laws of Motion โ˜…โ˜…โ˜…

Newton’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.

2.1 Newton’s Laws

Formula 8: F = ma

What it means: Force = mass ร— acceleration. The single most important equation in mechanics. Net force on an object equals mass times its acceleration.

Formula 9: Impulse โ†’ J = F ร— t = ฮ”p = m(v โˆ’ u)

What it means: Impulse = change in momentum. If a force acts for a short time, use impulse.

2.2 Friction

Formula 10: f = ฮผN

What it means: Friction force = coefficient of friction ร— normal force. For static friction: f โ‰ค ฮผโ‚›N. For kinetic friction: f = ฮผโ‚–N.

โœ๏ธ Solved Example: A block of mass 5 kg is pushed along a surface with ฮผโ‚– = 0.3. Find the friction force. (g = 10 m/sยฒ)

  • N = mg = 5 ร— 10 = 50 N
  • f = ฮผโ‚–N = 0.3 ร— 50 = 15 N

Chapter 3: Work, Energy and Power โ˜…โ˜…โ˜…

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 โ€” treat them all as guaranteed syllabus for Re-NEET 2026 Physics preparation.

NEET consistently tests energy conservation and work-energy theorem. These are highly scoring NEET Physics important formulas 2026 if you know them cold.

3.1 Work

Formula 11: W = F ร— d ร— cosฮธ

What it means: Work = Force ร— displacement ร— cosine of angle between them. If force and displacement are in the same direction, ฮธ = 0ยฐ and cos0ยฐ = 1, so W = Fd.

3.2 Kinetic and Potential Energy

Formula 12: KE = ยฝmvยฒ

Formula 13: PE (gravitational) = mgh

Formula 14: Conservation of energy โ†’ KEโ‚ + PEโ‚ = KEโ‚‚ + PEโ‚‚

3.3 Power

Formula 15: P = W/t = Fv

What it means: Power is the rate of doing work. Also equals force ร— velocity.

โœ๏ธ Solved Example: A 2 kg object falls from rest through a height of 10 m. Find its velocity just before hitting the ground. (g = 10 m/sยฒ)

  • Using energy conservation: mgh = ยฝmvยฒ
  • vยฒ = 2gh = 2 ร— 10 ร— 10 = 200
  • v = โˆš200 = 10โˆš2 โ‰ˆ 14.14 m/s

Chapter 4: Rotational Motion โ˜…โ˜…โ˜…

For Re-NEET 2026 Physics preparation, Rotational Motion is the chapter students most often leave incomplete. Don’t. It’s worth 2โ€“3 questions every year. The moment of inertia table in this Re-NEET 2026 Physics formula sheet is a direct marks-saver.

One of the toughest chapters โ€” but NEET asks 2โ€“3 questions here every year. For your Re-NEET 2026 Physics formula sheet, the moment of inertia table and rolling motion formulas are non-negotiable.

4.1 Moment of Inertia

Formula 16: ฯ„ = Iฮฑ

What it means: Torque = Moment of Inertia ร— angular acceleration. This is the rotational equivalent of F = ma.

Formula 17: L = Iฯ‰ (Angular momentum)

Formula 18: KE (rotational) = ยฝIฯ‰ยฒ

4.2 Key Moments of Inertia (Must Memorise)

BodyAxisFormula
Solid sphereThrough centre2/5 MRยฒ
Hollow sphereThrough centre2/3 MRยฒ
Solid cylinder/discThrough centre1/2 MRยฒ
Thin rodThrough centre1/12 MLยฒ
Thin rodThrough end1/3 MLยฒ
RingThrough centreMRยฒ

4.3 Rolling Motion

Formula 19: Total KE (rolling) = ยฝmvยฒ + ยฝIฯ‰ยฒ

What it means: A rolling body has both translational KE (ยฝmvยฒ) and rotational KE (ยฝIฯ‰ยฒ). For a solid sphere rolling: Total KE = 7/10 mvยฒ

โœ๏ธ Solved Example: A solid sphere of mass 2 kg and radius 0.1 m rolls without slipping at 5 m/s. Find its total KE.

  • Total KE = 7/10 mvยฒ = 7/10 ร— 2 ร— 25 = 35 J

Chapter 5: Gravitation โ˜…โ˜…

Gravitation is one of the cleanest sections in this Re-NEET 2026 Physics formula sheet โ€” just 6 formulas, all direct substitution. NEET Physics important formulas 2026 from this chapter are very predictable.

Gravitation questions in NEET are usually direct formula substitution โ€” very scoring if you remember the Re-NEET Physics chapter formulas here. These are among the easiest marks available.

Formula 20: F = Gmโ‚mโ‚‚/rยฒ (Newton’s Law of Gravitation)

What it means: Force between two masses is proportional to the product of masses and inversely proportional to the square of distance. G = 6.67 ร— 10โปยนยน N mยฒ/kgยฒ

Formula 21: g = GM/Rยฒ (acceleration due to gravity on surface)

Formula 22: g at height h โ†’ gโ‚• = g(1 โˆ’ 2h/R) [when h << R]

Formula 23: Orbital velocity โ†’ vโ‚’ = โˆš(GM/r) = โˆš(gRยฒ/r)

Formula 24: Escape velocity โ†’ vโ‚‘ = โˆš(2GM/R) = โˆš(2gR) = 11.2 km/s for Earth

Formula 25: Time period of satellite โ†’ T = 2ฯ€โˆš(rยณ/GM)

โœ๏ธ Solved Example: Find the escape velocity from Earth. (g = 10 m/sยฒ, R = 6.4 ร— 10โถ m)

  • vโ‚‘ = โˆš(2gR) = โˆš(2 ร— 10 ร— 6.4 ร— 10โถ) = โˆš(1.28 ร— 10โธ)
  • = 11,314 m/s โ‰ˆ 11.3 km/s โœ“ (matches standard value)

Chapter 6: Thermodynamics โ˜…โ˜…โ˜…

Thermodynamics carries 3โ€“4 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.

Formula 26: First Law of Thermodynamics โ†’ ฮ”U = Q โˆ’ W

What it means: Change in internal energy = Heat added to system โˆ’ Work done BY the system. Sign convention is critical here.

Formula 27: Ideal Gas Law โ†’ PV = nRT

What it means: Pressure ร— Volume = moles ร— universal gas constant ร— temperature. R = 8.314 J/molยทK

Formula 28: Work done in isothermal process โ†’ W = nRT ln(Vโ‚‚/Vโ‚)

Formula 29: Efficiency of Carnot engine โ†’ ฮท = 1 โˆ’ Tโ‚‚/Tโ‚ = (Tโ‚ โˆ’ Tโ‚‚)/Tโ‚

What it means: Tโ‚ = temperature of hot source, Tโ‚‚ = temperature of cold sink. Both in Kelvin.

Formula 30: Cp โˆ’ Cv = R (Mayer’s relation)

Formula 31: ฮณ = Cp/Cv โ†’ Monoatomic: ฮณ = 5/3 | Diatomic: ฮณ = 7/5

โœ๏ธ Solved Example: A Carnot engine operates between 600 K and 300 K. Find its efficiency.

  • ฮท = 1 โˆ’ Tโ‚‚/Tโ‚ = 1 โˆ’ 300/600 = 1 โˆ’ 0.5 = 50%

Chapter 7: Electrostatics โ˜…โ˜…โ˜…

One of the highest-scoring chapters. Coulomb’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 Re-NEET 2026 19 day plan for a hour-by-hour breakdown of how to slot these chapters.

Formula 32: Coulomb’s Law โ†’ F = kqโ‚qโ‚‚/rยฒ

What it means: k = 9 ร— 10โน N mยฒ/Cยฒ. Force between charges is attractive for unlike charges, repulsive for like charges.

Formula 33: Electric field โ†’ E = F/q = kQ/rยฒ

Formula 34: Electric potential โ†’ V = kQ/r

Formula 35: Relation between E and V โ†’ E = โˆ’dV/dr

Formula 36: Energy stored in capacitor โ†’ U = ยฝCVยฒ = Qยฒ/2C = QV/2

Formula 37: Capacitors in series โ†’ 1/C = 1/Cโ‚ + 1/Cโ‚‚

Formula 38: Capacitors in parallel โ†’ C = Cโ‚ + Cโ‚‚

Formula 39: Capacitance with dielectric โ†’ C = ฮตโ‚’A/d (parallel plate); with dielectric: C = Kฮตโ‚’ A/d

โœ๏ธ Solved Example: Two charges of +4 ฮผC and +4 ฮผC are placed 0.2 m apart. Find the force between them.

  • F = kqโ‚qโ‚‚/rยฒ = (9ร—10โน ร— 4ร—10โปโถ ร— 4ร—10โปโถ) / (0.2)ยฒ
  • = (9ร—10โน ร— 16ร—10โปยนยฒ) / 0.04
  • = 144ร—10โปยณ / 0.04 = 3.6 N

Chapter 8: Current Electricity โ˜…โ˜…โ˜…

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 โ€” read a circuit, apply a formula, get the mark.

Highest-weightage chapter in Class 12 Physics for NEET. Circuit problems, Ohm’s law, and Kirchhoff’s laws are standard. These are the Re-NEET Physics chapter formulas you absolutely cannot go into the exam without knowing cold.

Formula 40: Ohm’s Law โ†’ V = IR

Formula 41: Resistivity โ†’ R = ฯL/A

Formula 42: Resistors in series โ†’ R = Rโ‚ + Rโ‚‚ + Rโ‚ƒ

Formula 43: Resistors in parallel โ†’ 1/R = 1/Rโ‚ + 1/Rโ‚‚ + 1/Rโ‚ƒ

Formula 44: Power in a circuit โ†’ P = VI = IยฒR = Vยฒ/R

Formula 45: Kirchhoff’s Current Law (KCL) โ†’ ฮฃI (at junction) = 0

What it means: Sum of currents entering a junction = Sum of currents leaving it.

Formula 46: Kirchhoff’s Voltage Law (KVL) โ†’ ฮฃV (in a loop) = 0

What it means: Sum of all EMFs and potential drops around any closed loop = zero.

Formula 47: Wheatstone bridge balance condition โ†’ P/Q = R/S

Formula 48: EMF and terminal voltage โ†’ V = E โˆ’ Ir (during discharge); V = E + Ir (during charging)

โœ๏ธ Solved Example: A 6 ฮฉ and 3 ฮฉ resistor are connected in parallel. Find the equivalent resistance.

  • 1/R = 1/6 + 1/3 = 1/6 + 2/6 = 3/6 = 1/2
  • R = 2 ฮฉ

Chapter 9: Magnetic Effects of Current & Magnetism โ˜…โ˜…โ˜…

Magnetism formulas are among the most-tested Re-NEET Physics chapter formulas in Class 12. Students who know F = qvBsinฮธ and the solenoid formula cold rarely drop marks here.

Biot-Savart law, Ampere’s law, and force on a moving charge are standard NEET questions.

Formula 49: Force on a moving charge โ†’ F = qvB sinฮธ

What it means: F = charge ร— velocity ร— magnetic field ร— sin of angle between v and B. Maximum when ฮธ = 90ยฐ.

Formula 50: Force on a current-carrying conductor โ†’ F = BIL sinฮธ

Formula 51: Magnetic field at centre of circular loop โ†’ B = ฮผโ‚’I/2r

Formula 52: Magnetic field inside a solenoid โ†’ B = ฮผโ‚’nI

What it means: n = number of turns per unit length. ฮผโ‚’ = 4ฯ€ ร— 10โปโท Tยทm/A

Formula 53: Torque on a current loop โ†’ ฯ„ = nBIA sinฮธ (or ฯ„ = MB sinฮธ)

Formula 54: Radius of circular motion of charge in magnetic field โ†’ r = mv/qB

โœ๏ธ Solved Example: A proton (mass = 1.67 ร— 10โปยฒโท kg, charge = 1.6 ร— 10โปยนโน C) moves at 2 ร— 10โถ m/s perpendicular to a magnetic field of 0.5 T. Find the radius of its circular path.

  • r = mv/qB = (1.67ร—10โปยฒโท ร— 2ร—10โถ) / (1.6ร—10โปยนโน ร— 0.5)
  • = 3.34ร—10โปยฒยน / 8ร—10โปยฒโฐ = 0.04175 m โ‰ˆ 4.2 cm

Chapter 10: Ray Optics โ˜…โ˜…โ˜…

Ray Optics is the most rewarding chapter in this NEET Physics revision sheet โ€” the mirror and lens formulas are simple, the sign convention is all you need to master, and 3โ€“4 marks are almost guaranteed for prepared students.

Ray optics is one of the most consistent chapters in NEET โ€” 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.

Formula 55: Mirror Formula โ†’ 1/f = 1/v + 1/u

What it means: 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.

Formula 56: Magnification (mirror) โ†’ m = โˆ’v/u = hโ‚‚/hโ‚

Formula 57: Lens Formula โ†’ 1/f = 1/v โˆ’ 1/u

Formula 58: Magnification (lens) โ†’ m = v/u

Formula 59: Lens Maker’s Formula โ†’ 1/f = (ฮผ โˆ’ 1)(1/Rโ‚ โˆ’ 1/Rโ‚‚)

Formula 60: Snell’s Law โ†’ ฮผโ‚ sinฮธโ‚ = ฮผโ‚‚ sinฮธโ‚‚ (or nโ‚ sinฮธโ‚ = nโ‚‚ sinฮธโ‚‚)

Formula 61: Refractive index โ†’ ฮผ = c/v = sin i / sin r

Formula 62: Critical angle โ†’ sin C = 1/ฮผ (for total internal reflection)

Formula 63: Power of lens โ†’ P = 1/f (in metres); unit is Dioptre (D)

Formula 64: Lenses in contact โ†’ 1/F = 1/fโ‚ + 1/fโ‚‚ (or P = Pโ‚ + Pโ‚‚)

โœ๏ธ Solved Example: An object is placed 30 cm in front of a convex lens of focal length 10 cm. Find the image distance.

  • 1/f = 1/v โˆ’ 1/u โ†’ 1/10 = 1/v โˆ’ 1/(โˆ’30)
  • 1/v = 1/10 โˆ’ 1/30 = 3/30 โˆ’ 1/30 = 2/30
  • v = 15 cm (real image, on other side of lens)

Chapter 11: Wave Optics โ˜…โ˜…

Wave Optics is a short but important part of this NEET Physics revision sheet. YDSE is the star โ€” one formula, direct marks.

Young’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.

Formula 65: Fringe width in YDSE โ†’ ฮฒ = ฮปD/d

What it means: ฮฒ = fringe width, ฮป = wavelength of light, D = distance from slits to screen, d = distance between slits.

Formula 66: Position of bright fringes โ†’ y = nฮปD/d (n = 0, 1, 2…)

Formula 67: Position of dark fringes โ†’ y = (2nโˆ’1)ฮปD/2d

Formula 68: Condition for constructive interference โ†’ ฮ” = nฮป

Formula 69: Condition for destructive interference โ†’ ฮ” = (2nโˆ’1)ฮป/2

โœ๏ธ Solved Example: In a YDSE, d = 1 mm, D = 1 m, ฮป = 600 nm. Find fringe width.

  • ฮฒ = ฮปD/d = (600ร—10โปโน ร— 1) / (1ร—10โปยณ)
  • = 600ร—10โปโถ m = 0.6 mm

Chapter 12: Modern Physics โ˜…โ˜…โ˜…

Photoelectric effect, atomic models, radioactivity โ€” very high weightage and mostly direct formula questions. For Re-NEET 2026 Physics preparation, Modern Physics alone can fetch you 3โ€“5 marks with minimal effort if formulas are memorised. Use the Biology final days revision to compare how a similar chapter-priority approach works for Biology.

12.1 Photoelectric Effect

Formula 70: Einstein’s photoelectric equation โ†’ KE_max = hฮฝ โˆ’ ฯ† = hฮฝ โˆ’ hฮฝโ‚€

What it means: Maximum kinetic energy of emitted electrons = energy of photon โˆ’ work function. h = 6.626 ร— 10โปยณโด Jยทs

Formula 71: Energy of photon โ†’ E = hฮฝ = hc/ฮป

Formula 72: de Broglie wavelength โ†’ ฮป = h/mv = h/p

12.2 Bohr’s Atomic Model

Formula 73: Radius of nth orbit โ†’ rโ‚™ = nยฒ ร— 0.529 ร… (for hydrogen)

Formula 74: Energy of nth orbit โ†’ Eโ‚™ = โˆ’13.6/nยฒ eV (for hydrogen)

Formula 75: Frequency of emitted photon โ†’ hฮฝ = Eโ‚‚ โˆ’ Eโ‚

12.3 Nuclear Physics & Radioactivity

Formula 76: Radioactive decay law โ†’ N = Nโ‚€ e^(โˆ’ฮปt)

Formula 77: Half-life โ†’ Tยฝ = 0.693/ฮป

Formula 78: Activity โ†’ A = ฮปN = Aโ‚€ e^(โˆ’ฮปt)

Formula 79: Mass-energy equivalence โ†’ E = mcยฒ (c = 3 ร— 10โธ m/s)

Formula 80: Binding energy per nucleon โ†’ BE = [Zm_p + Nm_n โˆ’ M] ร— 931.5 MeV

โœ๏ธ Solved Example: The work function of a metal is 2 eV. What is the maximum KE of electrons when light of frequency 1.5 ร— 10ยนโต Hz is incident? (h = 6.6 ร— 10โปยณโด Jยทs, 1 eV = 1.6 ร— 10โปยนโน J)

  • E = hฮฝ = 6.6ร—10โปยณโด ร— 1.5ร—10ยนโต = 9.9ร—10โปยนโน J = 9.9ร—10โปยนโน / 1.6ร—10โปยนโน = 6.19 eV
  • KE_max = 6.19 โˆ’ 2 = 4.19 eV

โœ๏ธ Solved Example (Half-life): A radioactive sample has a half-life of 10 days. What fraction remains after 30 days?

  • Number of half-lives = 30/10 = 3
  • Fraction remaining = (1/2)ยณ = 1/8

Chapter 13: Electromagnetic Induction & AC โ˜…โ˜…โ˜…

This is a chapter that students often underestimate. In this Re-NEET 2026 Physics formula sheet, it ranks among the highest-ROI sections โ€” the formulas are concise and questions are almost always numerical.

Faraday’s law, Lenz’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 โ€” students who know these formulas cold rarely get these questions wrong.

Formula 81: Faraday’s Law โ†’ EMF = โˆ’dฮฆ/dt = โˆ’N(dฮฆ/dt)

What it means: Induced EMF = rate of change of magnetic flux. The negative sign means it opposes the change (Lenz’s Law).

Formula 82: Magnetic flux โ†’ ฮฆ = BAcosฮธ

Formula 83: Motional EMF โ†’ ฮต = BLv

Formula 84: Transformer equation โ†’ Vโ‚/Vโ‚‚ = Nโ‚/Nโ‚‚ = Iโ‚‚/Iโ‚

What it means: Step-up transformer: Nโ‚‚ > Nโ‚ โ†’ Vโ‚‚ > Vโ‚. Step-down transformer: Nโ‚‚ < Nโ‚.

Formula 85: Inductive reactance โ†’ X_L = ฯ‰L = 2ฯ€fL

Formula 86: Capacitive reactance โ†’ X_C = 1/ฯ‰C = 1/2ฯ€fC

Formula 87: Impedance in series LCR โ†’ Z = โˆš(Rยฒ + (X_L โˆ’ X_C)ยฒ)

Formula 88: Resonance condition โ†’ X_L = X_C โ†’ ฯ‰โ‚€ = 1/โˆš(LC)

Formula 89: RMS values โ†’ V_rms = Vโ‚€/โˆš2 ; I_rms = Iโ‚€/โˆš2

โœ๏ธ Solved Example: A transformer has 200 primary turns and 1000 secondary turns. If primary voltage is 220 V, find secondary voltage.

  • Vโ‚/Vโ‚‚ = Nโ‚/Nโ‚‚ โ†’ 220/Vโ‚‚ = 200/1000
  • Vโ‚‚ = 220 ร— 1000/200 = 1100 V

Chapter 14: Simple Harmonic Motion (SHM) โ˜…โ˜…

For your NEET Physics revision sheet, SHM is a chapter to revise in one sitting โ€” it’s compact but high-yield.

SHM appears in 1โ€“2 NEET questions yearly โ€” mostly displacement, velocity, and time period. These Re-NEET 2026 Physics preparation formulas are short, clean, and very fast to answer if memorised.

Formula 90: Displacement in SHM โ†’ x = A sin(ฯ‰t + ฯ†)

Formula 91: Velocity in SHM โ†’ v = ฯ‰โˆš(Aยฒ โˆ’ xยฒ)

What it means: Maximum velocity is at x = 0 (mean position): v_max = Aฯ‰

Formula 92: Acceleration in SHM โ†’ a = โˆ’ฯ‰ยฒx

What it means: Acceleration is always directed toward mean position. Maximum at x = A (extreme): a_max = ฯ‰ยฒA

Formula 93: Time period of simple pendulum โ†’ T = 2ฯ€โˆš(L/g)

Formula 94: Time period of spring-mass system โ†’ T = 2ฯ€โˆš(m/k)

Formula 95: Total energy in SHM โ†’ E = ยฝmฯ‰ยฒAยฒ (constant)

โœ๏ธ Solved Example: A pendulum has a length of 1 m. Find its time period. (g = 10 m/sยฒ)

  • T = 2ฯ€โˆš(L/g) = 2ฯ€โˆš(1/10) = 2ฯ€ ร— 0.316 = 1.99 s โ‰ˆ 2 s

Quick Reference: Constants You Must Know

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 โ€” 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 โ€” do not waste time calculating constants during the exam.

ConstantSymbolValue
Speed of lightc3 ร— 10โธ m/s
Planck’s constanth6.626 ร— 10โปยณโด Jยทs
Charge of electrone1.6 ร— 10โปยนโน C
Mass of electronmโ‚‘9.1 ร— 10โปยณยน kg
Mass of protonmโ‚š1.67 ร— 10โปยฒโท kg
Boltzmann constantk1.38 ร— 10โปยฒยณ J/K
Universal gas constantR8.314 J/molยทK
Permeability of free spaceฮผโ‚’4ฯ€ ร— 10โปโท Tยทm/A
Permittivity of free spaceฮตโ‚’8.85 ร— 10โปยนยฒ Cยฒ/Nยทmยฒ
Coulomb’s constantkB9 ร— 10โน Nยทmยฒ/Cยฒ
Gravitational constantG6.67 ร— 10โปยนยน Nยทmยฒ/kgยฒ
1 eVโ€”1.6 ร— 10โปยนโน J
1 u (atomic mass unit)โ€”931.5 MeV/cยฒ

Last-Day Revision Tip from KSquare

Don’t try to re-read this entire sheet on June 20. Instead:

  • Day before (June 20): Cover Constants + Modern Physics + Current Electricity + Optics
  • Morning of June 21: 20-minute glance at SHM + Thermodynamics + Kinematics formulas only
  • At exam centre: Trust your preparation. Do not open notes at the gate.

Physics in NEET rewards students who stay calm and apply formulas systematically. This Re-NEET 2026 Physics formula sheet โ€” used as a NEET Physics revision sheet every morning โ€” is the difference between hesitation and confidence at the exam centre.

Make sure you also check the Re-NEET 2026 exam day checklist and the 48-hour pre-exam guide guide before June 21.

You’ve got this. See you on the other side.

FAQ Section

Q: How many Physics questions come from Mechanics in NEET? (Use this Re-NEET 2026 Physics formula sheet FAQ for exam-day clarity)

A: Mechanics (Kinematics, Laws of Motion, Work-Energy, Rotational Motion, Gravitation) typically contributes 8โ€“12 questions out of the 45 Physics questions in NEET. It is the single largest chunk from Class 11 Physics and must not be skipped.

Q: Which Physics chapter has the highest weightage in NEET? A: Historically, Current Electricity, Electrostatics, Ray Optics, and Modern Physics each contribute 3โ€“5 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.

Q: Is it enough to just memorise formulas for NEET Physics? A: No โ€” but it’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.

Q: What is the sign convention for mirrors and lenses in NEET? 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.

Q: Do I need to memorise all moments of inertia for NEET? A: Yes โ€” specifically for solid sphere (2/5 MRยฒ), hollow sphere (2/3 MRยฒ), solid disc/cylinder (1/2 MRยฒ), and ring (MRยฒ). These four appear repeatedly in NEET rotational motion questions and rolling motion problems.

Q: What value of g should I use in NEET calculations? A: Unless specifically stated otherwise, use g = 10 m/sยฒ in NEET numerical problems. Using 9.8 m/sยฒ when the question expects 10 m/sยฒ will give a slightly different answer and you may mark the wrong option.

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