NEET Physics – 50 Practice MCQs
NEET is a 180-question MCQ exam (Physics 45, Chemistry 45, Biology 90) with +4 for correct and –1 for incorrect answers. The best preparation is solving official previous-year papers.
(Based on the latest NEET UG syllabus – NCERT Class 11 & 12. Single correct option. Marking: +4 / –1)
Mechanics & Properties of Matter
The dimensional formula of torque is the same as that of
(1) Force (2) Energy (3) Momentum (4) Power
A body of mass 2 kg is thrown vertically upward with a velocity of 20 m/s. The maximum potential energy attained is (g = 10 m/s²)
(1) 200 J (2) 400 J (3) 100 J (4) 50 J
The moment of inertia of a thin circular disc of mass M and radius R about its diameter is
(1) MR²/2 (2) MR²/4 (3) MR² (4) 2MR²
A simple pendulum has a time period T on the earth. When taken to a planet where acceleration due to gravity is 4 times that on earth, its time period becomes
(1) T/2 (2) 2T (3) T/4 (4) 4T
The coefficient of viscosity of a liquid has the dimensions
(1) [ML⁻¹T⁻¹] (2) [MLT⁻¹] (3) [ML⁻¹T⁻²] (4) [M⁰L⁰T⁰]
Laws of Motion & Work-Energy
A force of 10 N acts on a body of mass 2 kg for 3 s. The change in momentum is
(1) 10 kg m/s (2) 20 kg m/s (3) 30 kg m/s (4) 60 kg m/s
The work done by a force F = (3î + 4ĵ) N in displacing a particle from origin to point (2, 3) m is
(1) 6 J (2) 12 J (3) 18 J (4) 24 J
Power of a pump which can lift 100 kg of water through a height of 10 m in 5 s (g = 10 m/s²) is
(1) 1 kW (2) 2 kW (3) 5 kW (4) 10 kW
Gravitation
The acceleration due to gravity at a height h above the surface of earth (radius R) is g/4. Then h is
(1) R (2) R/2 (3) 2R (4) R/4
Escape velocity from the surface of earth is 11.2 km/s. Escape velocity from a planet of same density but twice the radius of earth is
(1) 11.2 km/s (2) 22.4 km/s (3) 5.6 km/s (4) 44.8 km/s
Thermodynamics & Kinetic Theory
The first law of thermodynamics is a statement of conservation of
(1) Momentum (2) Energy (3) Charge (4) Mass
For an ideal gas, in an isothermal process
(1) ΔU = 0 (2) ΔQ = 0 (3) ΔW = 0 (4) ΔT ≠ 0
The rms speed of oxygen molecules at 27°C is approximately
(1) 483 m/s (2) 193 m/s (3) 683 m/s (4) 983 m/s
In a Carnot engine, the temperature of source is 600 K and sink is 300 K. Efficiency is
(1) 25% (2) 50% (3) 75% (4) 100%
Oscillations & Waves
The frequency of a simple pendulum of length 1 m is approximately (g = π²)
(1) 0.5 Hz (2) 1 Hz (3) 2 Hz (4) 0.25 Hz
Two waves of frequencies 100 Hz and 102 Hz produce beats. Number of beats per second is
(1) 2 (2) 101 (3) 202 (4) 0
The velocity of sound in air at 0°C is 330 m/s. At 27°C it becomes approximately
(1) 330 m/s (2) 346 m/s (3) 360 m/s (4) 300 m/s
Electrostatics & Current Electricity
The electric field due to an infinite plane sheet of charge density σ is
(1) σ/ε₀ (2) σ/2ε₀ (3) 2σ/ε₀ (4) σ/4ε₀
Capacitance of a parallel plate capacitor increases when
(1) Distance between plates increases (2) Area decreases (3) Dielectric is introduced (4) Charge decreases
Resistivity of a wire depends on
(1) Length (2) Area (3) Material (4) Both length and area
Kirchhoff’s first law is based on conservation of
(1) Energy (2) Charge (3) Momentum (4) Mass
In a Wheatstone bridge, the condition for balance is
(1) P/Q = R/S (2) P/R = Q/S (3) P/S = Q/R (4) P + Q = R + S
Magnetic Effects & EMI
Magnetic field at the centre of a current-carrying circular loop of radius R is
(1) μ₀I/2R (2) μ₀I/4πR (3) μ₀I/2πR (4) μ₀I/R
A charged particle moves in a uniform magnetic field. The force acting on it is
(1) Always zero (2) Maximum when velocity is parallel to B (3) Maximum when velocity is perpendicular to B (4) Independent of velocity
Faraday’s law of electromagnetic induction states that induced emf is equal to
(1) Rate of change of magnetic flux (2) Rate of change of magnetic field (3) Rate of change of area (4) Rate of change of current
The SI unit of magnetic flux is
(1) Tesla (2) Weber (3) Henry (4) Gauss
Optics
Focal length of a convex lens of refractive index 1.5 is 20 cm in air. When immersed in water (μ = 4/3), focal length becomes
(1) 20 cm (2) 40 cm (3) 60 cm (4) 80 cm
In Young’s double slit experiment, fringe width is
(1) λD/d (2) λd/D (3) D/λd (4) d/λD
Brewster’s law is
(1) μ = tan iₚ (2) μ = sin iₚ (3) μ = cos iₚ (4) μ = cot iₚ
Resolving power of a microscope is increased by
(1) Decreasing wavelength (2) Increasing wavelength (3) Decreasing numerical aperture (4) Increasing focal length
Dual Nature, Atoms & Nuclei
de Broglie wavelength of an electron accelerated through V volt is
(1) 12.27/√V Å (2) 1.227/√V Å (3) 12.27√V Å (4) 1.227√V Å
The work function of a metal is 4 eV. Maximum wavelength of photon that can cause photoelectric emission is
(1) 3100 Å (2) 4000 Å (3) 6200 Å (4) 1550 Å
In Bohr’s model, the radius of the nth orbit is proportional to
(1) n (2) n² (3) 1/n (4) 1/n²
Half-life of a radioactive substance is 10 days. After 30 days the fraction remaining is
(1) 1/2 (2) 1/4 (3) 1/8 (4) 1/16
Binding energy per nucleon is maximum for
(1) ²H (2) ⁴He (3) ⁵⁶Fe (4) ²³⁸U
Semiconductor Electronics
In an n-type semiconductor, the majority carriers are
(1) Electrons (2) Holes (3) Both (4) Neither
The forbidden energy gap in pure silicon is approximately
(1) 0.1 eV (2) 0.7 eV (3) 1.1 eV (4) 5 eV
A p-n junction diode is forward biased when
(1) p-side is connected to positive and n-side to negative (2) p-side to negative and n-side to positive (3) Both sides to positive (4) Both sides to negative
In a CE transistor amplifier, the phase difference between input and output signals is
(1) 0° (2) 90° (3) 180° (4) 270°
The logic gate that gives high output only when both inputs are high is
(1) OR (2) AND (3) NOT (4) NOR
Mixed / Application Based
A body is moving in a circular path with constant speed. Its acceleration is
(1) Zero (2) Constant in magnitude and direction (3) Constant in magnitude but changing direction (4) Changing in magnitude and direction
The ratio of kinetic energy to potential energy of a simple harmonic oscillator at mean position is
(1) 1 : 1 (2) 1 : 2 (3) ∞ : 1 (4) 2 : 1
When a dielectric slab is inserted between the plates of a charged parallel plate capacitor (battery disconnected), the potential difference
(1) Increases (2) Decreases (3) Remains same (4) Becomes zero
The magnetic moment of an electron orbiting in the first Bohr orbit is
(1) eħ/2m (2) eħ/m (3) 2eħ/m (4) eħ/4m
Intensity of a wave is proportional to
(1) Amplitude (2) Square of amplitude (3) Frequency (4) Wavelength
A transformer works on the principle of
(1) Mutual induction (2) Self induction (3) Eddy currents (4) Hysteresis
The energy of a photon of wavelength 4000 Å is approximately
(1) 3.1 eV (2) 1.5 eV (3) 4.1 eV (4) 2.5 eV
In the photoelectric effect, the maximum kinetic energy of photoelectrons depends on
(1) Intensity of light (2) Frequency of light (3) Both intensity and frequency (4) Neither
The unit of magnetic permeability is
(1) H/m (2) Tm/A (3) Both (1) and (2) (4) Wb/m²
Which of the following has the highest penetrating power?
(1) α-rays (2) β-rays (3) γ-rays (4) X-rays (soft)
Answer Key
1-2, 2-2, 3-2, 4-1, 5-1,
6-3, 7-3, 8-2, 9-1, 10-2,
11-2, 12-1, 13-1, 14-2, 15-1,
16-1, 17-2, 18-2, 19-3, 20-3,
21-2, 22-1, 23-1, 24-3, 25-1,
26-2, 27-4, 28-1, 29-1, 30-1,
31-1, 32-1, 33-2, 34-3, 35-3,
36-1, 37-3, 38-1, 39-3, 40-2,
41-3, 42-3, 43-2, 44-1, 45-2,
46-1, 47-1, 48-2, 49-3, 50-3
These questions cover the major units tested in NEET Physics. Practise them under timed conditions (≈ 45–50 minutes for 50 questions).Want solutions/explanations for any specific questions, chapter-wise sets (e.g., only Modern Physics or Electrostatics),
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