NEET Physics Formula Sheet: High Yield Formulas by Unit

This NEET physics formula sheet groups the formulas that come up again and again in the medical entrance exam, from the simple pendulum period $T = 2\pi\sqrt{l/g}$ to the photoelectric equation. NEET physics is built on the NCERT Class 11 and Class 12 books, so every formula here is one you have already met in school; what changes is the speed and the twist in the question.

If you want a physics formula sheet for NEET as a PDF, including the Class 11 part, print this page from your browser and save it as a PDF. This is an independent revision summary and not material from the exam conducting body. For the full chapter lists, see the Class 11 formulas in chapter order and the Class 12 physics sheet; every other course sheet is on the formula sheets hub.

Quick facts

Syllabus base
NCERT Class 11 and Class 12 physics
Question style
Multiple choice, so ratios and shortcuts save time
High yield
Mechanics, current electricity, optics, modern physics
Constants
g = 9.8 m/s², h = 6.626 × 10⁻³⁴ J s, e = 1.602 × 10⁻¹⁹ C
Handy value
hc ≈ 1240 eV nm
PDF
Print the page and save it as a PDF

Mechanics: the biggest block on the NEET physics formula sheet

Motion, force, energy, rotation and gravity
Formula	Typical NEET use	Unit	Topic page
$v^2 = u^2 + 2as$	speed after a distance at uniform acceleration	m/s	Equations of motion page
$R = \frac{u^2\sin 2\theta}{g},\ R_{max} = \frac{u^2}{g}$	projectile range, largest at 45°	m	Range page
$f = \mu N$	friction on a block or an incline	N	Coefficient of friction page
$K = \frac{p^2}{2m}$	kinetic energy and momentum linked	J	Kinetic energy page
$I_{ring} = MR^2,\ I_{disc} = \frac{1}{2}MR^2,\ I_{sphere} = \frac{2}{5}MR^2$	moments of inertia about symmetry axes	kg m²	Moment of inertia page
$g = \frac{GM}{R^2}$	surface gravity of a planet	m/s²	Gravity page
$v_e = \sqrt{2}\,v_o$	escape speed compared with low orbit speed	m/s	Escape velocity page
$T^2 \propto r^3$	Kepler's third law for orbits	s²	Satellite period page

Ratio trick: if g on a planet is one quarter of Earth's, a pendulum there has twice the period, since T depends on 1/√g.

Properties of matter, heat and oscillations

Solids, fluids, thermal physics, SHM and waves
Formula	Typical NEET use	Unit	Topic page
$Y = \frac{FL}{A\,\Delta L}$	stretch of a wire under load	Pa	Young's modulus page
$v_t = \frac{2r^2(\rho - \sigma)g}{9\eta}$	terminal speed of a sphere in a liquid	m/s	Terminal velocity page
$A_1v_1 = A_2v_2$	faster flow where a pipe narrows	m³/s	Fluids page
$\eta = 1 - \frac{T_2}{T_1}$	Carnot engine efficiency, kelvin temperatures	no unit	Thermodynamics page
$v_{rms} = \sqrt{\frac{3RT}{M}}$	molecular speed against temperature	m/s	Speed page
$T = 2\pi\sqrt{\frac{m}{k}}$	period of a spring and block	s	Period page
$f_n = \frac{nv}{2L}$	harmonics of a string or open pipe	Hz	Frequency page

Example 1: a pendulum on another planet

A pendulum of length 0.80 m is taken to a planet where g is 2.45 m/s². Find its period there and on Earth.

On Earth: $T = 2\pi\sqrt{\frac{0.80}{9.8}} = 2\pi(0.286) = 1.8\ \text{s}$ .

On the planet, g is a quarter of 9.8, so $T = 2\pi\sqrt{\frac{0.80}{2.45}} = 2\pi(0.571) = 3.6\ \text{s}$ . Answer: 1.8 s on Earth and 3.6 s on the planet, the doubling the ratio trick predicts.

Electrostatics, current and magnetism

Charges, circuits and magnetic effects
Formula	Typical NEET use	Unit	Topic page
$E = \frac{\sigma}{\varepsilon_0}$	field just outside a charged conductor	N/C	Surface charge density page
$C = \frac{K\varepsilon_0 A}{d}$	plate capacitor with a slab filling the gap	F	Capacitance page
$R = \frac{\rho L}{A}$	comparing wires of one metal	Ω	Resistivity page
$v_d = \frac{eE\tau}{m}$	drift speed of electrons	m/s	Drift velocity page
$r = \frac{mv}{qB}$	radius of a charge circling in a magnetic field	m	Magnetic force page
$B = \frac{\mu_0 NI}{2R}$	field at the centre of a coil of N turns	T	Magnetic field page
$\varepsilon = Blv$	motional emf of a moving rod	V	EMF page
$X_L = \omega L,\ X_C = \frac{1}{\omega C}$	reactances in AC circuits	Ω	Impedance page

Example 2: a ratio question on resistance

Two wires are made of the same metal. Wire A is half as long as wire B but has twice its radius. Find the ratio of their resistances.

Since $R = \frac{\rho L}{\pi r^2}$ , $\frac{R_A}{R_B} = \frac{L_A}{L_B}\left(\frac{r_B}{r_A}\right)^2 = \frac{1}{2}\times\left(\frac{1}{2}\right)^2 = \frac{1}{8}$ .

Answer: R_A : R_B = 1 : 8. No numbers for ρ were needed, which is typical of NEET.

Optics and modern physics

Rays, waves, photons, atoms and nuclei
Formula	Typical NEET use	Unit	Topic page
$\frac{1}{f} = \frac{1}{v} - \frac{1}{u}$	thin lens, New Cartesian signs	m⁻¹	Lens formula page
$P = \frac{1}{f}$	lens power, f in metres	D	Power of lens page
$\mu = \frac{1}{\sin C}$	critical angle and total internal reflection	no unit	Refractive index page
$\beta = \frac{D\lambda}{d}$	spacing of bright fringes	m	Wavelength page
$\frac{1}{2}mv_{max}^2 = h\nu - \phi_0$	photoelectron energy	J or eV	Dual nature sheet page
$N = \frac{n(n-1)}{2}$	spectral lines from level n down to the ground state	no unit	Spectral lines page
$N = N_0 e^{-\lambda t},\ T_{1/2} = \frac{0.693}{\lambda}$	radioactive decay and half life	s	Modern physics page

Semiconductor questions mostly test logic gate truth tables and diode behaviour rather than formulas, so practise those alongside this table.

How to use a physics formula sheet for NEET in the last weeks

Read one unit a day aloud. Say what each symbol means and its unit.
Learn proportionalities. Many questions only need T ∝ √l, R ∝ L/r² or F ∝ 1/r².
Check options by dimensions. A wrong option often has the wrong dimensions, which rules it out in seconds.
Keep NCERT diagrams in mind. Graphs of photocurrent, SHM energy and stress against strain are frequent.

Wrong answers can cost marks, so check the units of each option before you choose.

Common traps in NEET physics

Degrees and radians. Angular formulas need radians.
Kelvin. Thermodynamics and kinetic theory need absolute temperature.
Mirror against lens magnification. m = −v/u for mirrors, m = v/u for lenses.
Series and parallel capacitors. They combine the opposite way to resistors.

Students also writing JEE Main can compare with the JEE Main physics formula sheet, which goes deeper into rotation and calculus.

Frequently asked questions

Is there an official NEET physics formula sheet?

NEET does not hand out a formula sheet in the exam hall, so you must carry the formulas in your head. Always check the current information bulletin for exam rules.

Can I get this neet physics formula sheet as a PDF?

Yes. Print it from the browser menu and pick the PDF printer option.

Which physics chapters matter most for NEET?

Mechanics, current electricity, electrostatics, optics and modern physics usually carry many questions, but the paper covers the whole Class 11 and 12 syllabus.

Are NCERT formulas enough for NEET physics?

Yes for the formulas themselves, since NEET is based on NCERT. You still need practice in applying them quickly and combining them.

How should I memorise physics formulas for NEET?

Group them by idea, learn the derivation of the key ones, and test yourself on ratios and units. Regular short revision works better than one long session.