NEET 2026 Physics Formulas Sheet - Topic-wise Important Formulas PDF

Important Physics Formulas For NEET 2026 PDF Download

To make the NEET physics study easier for aspirants, all the important physics formulas for NEET 2026 are given in one place. It is prepared to help students revise quickly and solve questions with speed and accuracy. The formula sheet covers key topics from mechanics, thermodynamics, electricity, waves, and modern physics.

Important NEET 2026 Physics Formulas for Quick Revision

The following formulas are arranged systematically to help candidates prepare the NEET Physics syllabus for NEET 2026 in an organised manner:

Kinematics Formulas

Displacement:
$s=ut+\frac{1}{2}a{t}^2$

Velocity (final):
$v=u+at$

Velocity squared:
$v^2=u^2+2as$

Average velocity:
$v_{\text{avg}}=\frac{u+v}{2}$

Where:
$u=$ initial velocity,
$v=$ final velocity,
$a=$ acceleration,
$t=$ time,
$s=$ displacement.

Trick to remember:
Start with $v=u+at$ — final velocity after accelerating.
Displacement $s$ grows like $ut$ (distance if no accel) plus the extra bit from acceleration, $\frac{1}{2}a{t}^2$.
Square velocity ($v^2$) links initial speed and displacement directly.
Average velocity is just the middle ground, $\frac{u+v}{2}$, easy to remember!

Projectile Motion

Time of flight:
$T=\frac{2u\sin \theta }{g}$

Maximum height:
$H=\frac{u^2{\sin }^2\theta }{2g}$

Horizontal range:
$R=\frac{u^2\sin 2\theta }{g}$

Where:
$u=$ initial speed,
$\theta =$ angle of projection,
$g=$ acceleration due to gravity.

Trick to remember:

Time of flight depends on vertical speed ($u\sin \theta$),

Max height depends on vertical speed squared,

Range depends on speed squared and the double angle ($2\theta$).

Just think: vertical controls height & time, horizontal controls range!

Work, Power, and Energy

Work done:
$W=F\times d\times \cos \theta$

Power:
$P=\frac{W}{t}$

Kinetic energy:
$KE=\frac{1}{2}m{v}^2$

Potential energy:
$PE=mgh$

Where,

$F=$ force,

$d=$ displacement,

$\theta =$ angle between force and displacement,

$m=$ mass,

$v=$ velocity,

$h=$ height,

$t=$ time.

Trick to remember:

Work = force along displacement,

Power = work done per unit time,

Kinetic energy depends on mass and speed squared,

Potential energy depends on weight and height.

Heat and Temperature

Heat gained or lost:

$Q=mc\mathrm{\Delta }T$

Heat for phase change:

$Q=mL$

Where,
$m=$ mass,
$c=$ specific heat capacity,
$\mathrm{\Delta }T=$ change in temperature,
$L=$ latent heat.

Trick to remember:

Heat changes temperature with $mc\mathrm{\Delta }T$,

or changes phase using $mL$ without temperature change.

Photoelectric Effect

Energy of photon:

$E=h\nu$

Kinetic energy of the emitted electron:

$K.E.=h\nu -\varphi$

Where,

$h=$ Planck’s constant,

$\nu =$ frequency of incident light,

$\varphi =$ work function of the metal.

Trick to remember:

Photon energy $h\nu$ kicks out electrons.

But some energy $\varphi$ is spent breaking free, and the leftover is kinetic energy.

Circular Motion

$F_c=\frac{m{v}^2}{r}$

Angular velocity:

$\omega =\frac{v}{r}$

Period of revolution:

$T=\frac{2\pi r}{v}$

Where,

$m=$ mass,

$v=$ tangential velocity,

$r=$ radius of the circle.

Trick to remember:

Centripetal force pulls inward, depends on speed squared and radius.

Angular velocity is speed per radius,

Period is how long to circle once, distance over speed.

Series LCR Circuit

Let the current in the circuit be $i$, with voltages across resistance $R$, inductance $L$, and capacitance $C$ given by:

The voltage across the resistor is $V_R=iR$ and it is in phase with the current.

The voltage across the inductor is $V_L=i\omega L$ which leads the current by 90°.

The voltage across the capacitor is $V_C=\frac{i}{\omega C}$ which lags the current by 90°.

The resultant voltage $V$ across the circuit is given by

$V=\sqrt{V_R^2+(V_L-V_C{)}^2}=\sqrt{(iR{)}^2+{(i\omega L-\frac{i}{\omega C})}^2}=iZ$,

where the impedance $Z$ of the circuit is

$Z=\sqrt{R^2+{(\omega L-\frac{1}{\omega C})}^2}$.

The phase angle $\varphi$ between the voltage and current is given by

$\tan \varphi =\frac{V_L-V_C}{V_R}=\frac{\omega L-\frac{1}{\omega C}}{R}$.

Trick to Remember:

Think of the circuit like a tug-of-war between the inductor and capacitor. The inductor “pulls” the voltage ahead of the current (leads), while the capacitor “holds back” (lags). The resistance is just the steady “anchor” in the middle. So, the total voltage is like the result of these forces combined — the resistance plus the difference between inductor and capacitor effects.

If the inductor wins, voltage leads; if the capacitor wins, voltage lags. The phase angle $\varphi$ tells you who’s winning.

Equations of Motion in SHM

Acceleration:

$a=-{\omega }^{2}x$

General displacement equation:

$x=A\sin (\omega t+\varphi )$

Other standard forms:

$x=A\sin \omega t$ (starting from mean position)

$x=-A\sin \omega t$ (starting to left)

$x=A\cos \omega t$ (starting from extreme position)

Velocity:

$v=\frac{dx}{dt}=A\omega \cos (\omega t+\varphi )$

Acceleration:

$a=\frac{dv}{dt}=-{\omega }^{2}x$

Differential equation of SHM:

$\frac{d^{2}x}{d{t}^2}+{\omega }^{2}x=0$

Trick to Remember:

In simple harmonic motion, acceleration always tries to bring you back to the centre. It is opposite to displacement and gets stronger the farther you go. That’s why $a=-{\omega }^{2}x$ always points back to the middle.

Electric Potential of Spherical Charge Distributions

Conducting sphere of radius $R$ with charge $Q$:

Outside ($r>R$):

$V(r)=\frac{1}{4\pi {ϵ}_0}\frac{Q}{r}$

Inside ($r<R$):

$V(r)=\frac{1}{4\pi {ϵ}_0}\frac{Q}{R}$

Uniformly charged non-conducting sphere:

Outside ($r>R$):

$V(r)=\frac{1}{4\pi {ϵ}_0}\frac{Q}{r}$

Inside ($r<R$):

$V(r)=\frac{1}{4\pi {ϵ}_0}\frac{Q}{2R^3}(3R^2-r^2)$

Trick to remember:

Outside voltage always behaves like a point charge, proportional to $\frac{1}{r}$. Inside a conducting sphere, the voltage is constant. Inside a non-conducting sphere, voltage changes smoothly with $r^2$ because charge spreads inside the volume.

Resistance and Resistivity

Resistance formula:

$R=\frac{\rho l}{A}$

where $\rho =$ resistivity,
$l=$ length of conductor,
$A=$ area of cross-section.

Resistivity relation:

$\rho =\frac{m}{n{e}^2\tau }$

where

$m$ = mass of electron,

$n$ = number of free electrons per unit volume,

$e$ = charge of electron,

$\tau$ = mean free time between collisions.

Trick to remember:

Resistance grows with length and resistivity, but shrinks with area. Resistivity depends on electron properties and collision time.

Kirchhoff's Voltage Law

The algebraic sum of all potential differences around a closed loop is zero:

$\sum V=0$

Trick to remember:

Think of a closed loop like a money loop: whatever you gain (rise in voltage), you must spend (drop in voltage) somewhere else. So, net change is zero.

Electromagnetic Waves

Electric and magnetic fields are perpendicular to each other and to the direction of propagation. The speed of light in a vacuum is:

$c=\frac{1}{\sqrt{{\mu }_0{ϵ}_0}}$

Also,

$B_0=\frac{E_0}{c}$

Trick to remember:

Electric and magnetic fields are like best friends standing at right angles, carrying light forward. The speed of light depends on how easily the vacuum lets electric (${ϵ}_0$) and magnetic (${\mu }_0$) fields “dance” together!

Total Internal Reflection

When a light ray goes from a denser to a rarer medium, it bends away from the normal. Beyond a certain incidence angle (critical angle $C$), the light is reflected:

$\sin C=\frac{n_2}{n_1}$

Conditions:

- Light travels from a denser to a rarer medium

- Angle of incidence $>C$ (critical angle)

Trick to remember:

Think “dense to rare, light dares to flare away from normal, but if it hits beyond the critical angle, it bounces back(total internal reflection)”

Young’s Double Slit Experiment

Bright fringes:

$x=\frac{n\lambda D}{d}$

Dark fringes:

$x=\frac{(2n-1)\lambda D}{2d}$

Fringe width:

$\beta =\frac{\lambda D}{d}$

Trick to remember:

Bright fringes come when path difference is multiple of wavelength ($n\lambda$), dark fringes happen at odd halves. Fringe width depends on wavelength, distance, and slit separation.

De Broglie Wavelength

$\lambda =\frac{h}{p}$

For an electron accelerated through potential $V$:

$\lambda =\frac{12.27}{\sqrt{V}}\text{Å}$

Trick to remember:

Wavelength is Planck’s constant over momentum. For electrons, higher accelerating voltage means more speed, so smaller wavelength, inverse square root relation.

Logic Gates

NOT Gate:

$Y=\bar{A}$

AND Gate:

$Y=A\cdot B$

OR Gate:

$Y=A+B$

NAND Gate:

$Y=\overline{A\cdot B}$

NOR Gate:

$Y=\overline{A+B}$

Trick to remember:

NOT just flips one input.

AND needs both to be 1.

OR needs at least one 1.

NAND and NOR are just AND and OR with a NOT on top, simply the opposite outputs.

NEET Physics Formulas 2026 Quick Flashcards

Flashcards are useful because they help you revise super fast and test yourself anytime, anywhere. You can flip through them on the bus, before sleeping, or even while waiting for tea, and that small effort adds up big time in your memory. Use these to keep important NEET physics formulas at your fingertips, no tension, no stress.

Flashcard 1

Formula: $v=u+at$

Name: First equation of motion (final velocity)

Flashcard 2

Formula: $s=ut+\frac{1}{2}a{t}^2$

Name: Second equation of motion (displacement)

Flashcard 3

Formula: $F=ma$

Name: Newton’s second law

Flashcard 4

Formula: $W=F\cos \theta \times d$

Name: Work done by a constant force

Flashcard 5

Formula: $KE=\frac{1}{2}m{v}^2$

Name: Kinetic energy

Flashcard 6

Formula: $PE=mgh$

Name: Gravitational potential energy

Flashcard 7

Formula: $V=IR$

Name: Ohm’s Law

Flashcard 8

Formula: $R=\frac{\rho l}{A}$

Name: Resistance of a conductor

Flashcard 9

Formula: $\lambda =\frac{h}{mv}$

Name: De Broglie wavelength

Flashcard 10

Formula: $Q=mc\mathrm{\Delta }T$

Name: Heat transfer

How to Remember Physics Formulas for NEET 2026

Knowing some smart tricks to remember physics formulas is just as important as memorising them. When you use these little hacks, formulas stick better and come to you faster during exams. It saves time and keeps you calm under pressure. Starting early and revising regularly makes the whole preparation less stressful and way more effective. Here’s how to use the NEET Formula Sheet 2026 and remember formulas like a pro:

1. Start revising formulas from day one of your NEET exam preparation so you build a solid base right from the start.

2. Spend 10 to 15 minutes every day just going over the formula sheet to keep things fresh in your brain.

3. Don’t only memorise, understand the theory behind the formulas so you can apply them easily when needed.

4. Keep your formula sheet close while practising previous years' NEET questions. It helps connect theory with actual problems.

5. Make the sheet your own by adding quick notes or shortcuts that help you remember stuff faster during the exam.