NEET Physics Practice Questions

Real exam: 180 questions · 200 minutes · +4 / −1 marking

22 free Physics MCQs written in the NEET exam pattern, each with a step-by-step solution. Tap an option for instant feedback — no sign-up, no ads.

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✍️ These are original practice questions written in the NEET pattern for the NEET (UG) medical entrance exam — not questions from any official past paper.

Practice questions with solutions

Score: 0 / 22
Units Measurement

Q1. The SI unit of power is the:

  1. Joule
  2. Newton
  3. Watt
  4. Pascal
Show answer

C. Watt — Power is the rate of doing work, measured in watts (W), where 1 W = 1 J/s. The joule is energy, the newton is force, and the pascal is pressure.

Mechanics

Q2. A body moving with constant velocity has an acceleration that is:

  1. Zero
  2. Constant but non-zero
  3. Continuously increasing
  4. Equal to g
Show answer

A. Zero — Acceleration is the rate of change of velocity. If the velocity is constant, it is not changing, so the acceleration is zero.

Optics

Q3. The bending of light as it passes from one transparent medium into another is called:

  1. Reflection
  2. Refraction
  3. Dispersion
  4. Diffraction
Show answer

B. Refraction — Refraction is the change in direction of light when it moves between media of different optical densities (e.g. air to glass), due to a change in its speed.

Electricity

Q4. Ohm's law relates potential difference (V), current (I) and resistance (R) as:

  1. V = I / R
  2. V = R / I
  3. V = I × R
  4. I = V × R
Show answer

C. V = I × R — Ohm's law states V = IR: the potential difference across a conductor equals the current through it times its resistance (at constant temperature).

Mechanics

Q5. The energy possessed by a body because of its motion is called:

  1. Potential energy
  2. Kinetic energy
  3. Chemical energy
  4. Thermal energy
Show answer

B. Kinetic energy — Kinetic energy is the energy of motion, given by ½mv². Potential energy is energy due to position or configuration.

Mechanics

Q6. In a vacuum, a feather and a coin dropped from the same height will reach the ground with the same:

  1. Momentum
  2. Kinetic energy
  3. Acceleration
  4. Mass
Show answer

C. Acceleration — In a vacuum there is no air resistance, so all objects fall with the same acceleration (g), regardless of mass, and take the same time to fall. Their momentum and kinetic energy differ because their masses differ.

Projectile Motion

Q7. Two projectiles are launched from the ground with the same initial speed, one at 30° above the horizontal and the other at 60°. Neglecting air resistance, which quantity is the same for both?

  1. Horizontal range
  2. Maximum height reached
  3. Time of flight
  4. Speed at the highest point of the path
Show answer

A. Horizontal range — Complementary launch angles (30° and 60°) give identical horizontal range since R ∝ sin2θ and sin60° = sin120°. Height, time of flight, and speed at the apex all differ.

Circular Motion

Q8. A car of mass m moves on a flat (unbanked) circular track of radius r, where the coefficient of friction between tyres and road is μ. The maximum speed at which it can turn without skidding is:

  1. μrg
  2. √(μr/g)
  3. √(μrg)
  4. √(rg/μ)
Show answer

C. √(μrg) — Friction supplies the centripetal force: μmg = mv²/r, so v_max = √(μrg). Mass cancels out.

Simple Harmonic Motion

Q9. A particle executes simple harmonic motion with amplitude 0.05 m and time period π seconds. Its maximum speed is:

  1. 0.05 m/s
  2. 0.1 m/s
  3. 0.2 m/s
  4. 0.025 m/s
Show answer

B. 0.1 m/s — Angular frequency ω = 2π/T = 2π/π = 2 rad/s. Maximum speed v_max = Aω = 0.05 × 2 = 0.1 m/s.

Gravitation

Q10. The escape velocity from Earth's surface is about 11 km/s. A hypothetical planet has the same mean density as Earth but twice its radius. The escape velocity from this planet's surface is approximately:

  1. 11 km/s
  2. 5.5 km/s
  3. 22 km/s
  4. 44 km/s
Show answer

C. 22 km/s — Escape velocity v = √(2GM/R) = R√(8πGρ/3), so for fixed density v ∝ R. Doubling the radius doubles the escape velocity to about 22 km/s.

Current Electricity

Q11. A uniform wire of resistance R is stretched (at constant volume) to twice its original length. Its new resistance is:

  1. R/4
  2. R/2
  3. 2R
  4. 4R
Show answer

D. 4R — At constant volume, doubling the length halves the cross-section, and R ∝ L/A ∝ L². Length ×2 gives resistance ×4, i.e. 4R.

Capacitance

Q12. Two capacitors of 2 μF and 4 μF are connected in series. The equivalent capacitance of the combination is:

  1. 6 μF
  2. 1.33 μF
  3. 3 μF
  4. 8 μF
Show answer

B. 1.33 μF — For series capacitors 1/C = 1/2 + 1/4 = 3/4, so C = 4/3 ≈ 1.33 μF, which is less than the smaller capacitor.

Photoelectric Effect

Q13. In the photoelectric effect, if the frequency of incident light is kept fixed (above threshold) and the intensity is increased, this increases the:

  1. Maximum kinetic energy of emitted electrons
  2. Threshold frequency of the metal
  3. Work function of the metal
  4. Number of photoelectrons emitted per second
Show answer

D. Number of photoelectrons emitted per second — Intensity determines the number of incident photons and hence the photocurrent (electrons per second). Maximum kinetic energy depends only on frequency; work function and threshold frequency are properties of the metal.

Ray Optics

Q14. A convex lens has a focal length of 25 cm. Its power is:

  1. +4 D
  2. +2.5 D
  3. +0.25 D
  4. -4 D
Show answer

A. +4 D — Power P = 1/f (in metres) = 1/0.25 = +4 dioptres. It is positive because the lens is converging.

Thermodynamics

Q15. A gas is compressed adiabatically. Which statement is correct for this process?

  1. Its temperature remains constant
  2. Its internal energy remains constant
  3. No heat is exchanged with the surroundings
  4. Its pressure remains constant
Show answer

C. No heat is exchanged with the surroundings — An adiabatic process is defined by zero heat exchange (Q = 0). During adiabatic compression, work done on the gas raises its internal energy and temperature.

Kinetic Theory

Q16. The root-mean-square speed of the molecules of an ideal gas is v at absolute temperature T. To make the rms speed equal to 2v, the temperature must be changed to:

  1. 2T
  2. 4T
  3. √2 T
  4. T/2
Show answer

B. 4T — Since v_rms ∝ √T, doubling the speed requires the temperature to increase by a factor of 4, giving 4T.

Electromagnetic Induction

Q17. An ideal transformer has 100 turns in its primary coil and 500 turns in its secondary coil. If 220 V AC is applied to the primary, the secondary voltage is:

  1. 44 V
  2. 110 V
  3. 550 V
  4. 1100 V
Show answer

D. 1100 V — For an ideal transformer V_s/V_p = N_s/N_p = 500/100 = 5, so V_s = 5 × 220 = 1100 V (a step-up transformer).

Dual Nature Matter

Q18. The de Broglie wavelength associated with a moving particle is inversely proportional to:

  1. Its momentum
  2. Its electric charge
  3. Its temperature
  4. The frequency of light illuminating it
Show answer

A. Its momentum — The de Broglie relation is λ = h/p, so wavelength is inversely proportional to the particle's momentum p.

Waves Doppler Effect

Q19. As a source of sound moves toward a stationary observer, the frequency heard by the observer is ___ the frequency emitted by the source.

  1. Lower than
  2. Equal to
  3. Higher than
  4. Exactly double
Show answer

C. Higher than — When the source approaches, successive wavefronts are compressed (shorter effective wavelength), so the observed frequency is higher than the emitted frequency (Doppler effect).

Semiconductor Devices

Q20. When a p-n junction diode is forward biased:

  1. The depletion region width increases
  2. The depletion region width decreases
  3. No current can flow through it
  4. It conducts only in the reverse direction
Show answer

B. The depletion region width decreases — Forward bias opposes the built-in potential, narrowing the depletion region and lowering the barrier so that a large forward current flows.

Magnetic Effects Of Current

Q21. A charged particle enters a uniform magnetic field with its velocity directed exactly parallel to the field. The magnetic force acting on the particle is:

  1. Maximum and equal to qvB
  2. Directed along the field
  3. Equal to mv²/r
  4. Zero
Show answer

D. Zero — The magnetic force is F = qvB sinθ. When v is parallel to B, θ = 0°, so sinθ = 0 and the force is zero; the particle moves undeflected.

Ray Optics

Q22. Total internal reflection of light can occur only when light travels from:

  1. A rarer medium to a denser medium at any angle
  2. A denser medium to a rarer medium at an angle greater than the critical angle
  3. Any medium at normal incidence
  4. Vacuum into glass at grazing incidence
Show answer

B. A denser medium to a rarer medium at an angle greater than the critical angle — Total internal reflection requires light to travel from a denser to a rarer medium with the angle of incidence exceeding the critical angle, so that no refracted ray emerges.

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