NEET UG 2021 · Physics · 50 questions

NEET 2021 Physics, question by question

The NEET 2021 Physics section had 50 questions from 22 chapters: 18 easy, 29 medium and 3 hard. 36% were easy, 11 points below the 2017–2026 average for Physics, and 32 (64%) came from Class 12. Current Electricity had the most, 4 questions.

Updated 2026-10-08

Questions: 50; 25% of the paper
Chapters asked: 22; 2 usual chapters skipped
Easy: 36%; 2017–2026 average 47%
From Class 12: 64%; 2017–2026 average 56%

The section

What Physics asked in 2021

Class balance, difficulty and the form of the questions. Bars below compare Physics across every paper from 2017–2026.

Class 11 and 12

1832

Class 11
Class 12

Difficulty

1829

Easy
Medium
Hard

New ideas: 41 (82%)
Use a figure: 10

Question pattern

PHYSICS 2021

Calculation58%
Application12%
Figure-based12%
Concept8%
Recall6%
Match the lists4%

Chapters

The 2021 Physics chapter split

All 22 Physics chapters asked, and which got more or less than usual: the chapter’s ten-year average per 180 questions. Counts are scaled to 180 questions so years compare fairly.

Every chapter asked

Current Electricity4 · usually 3.2
Electrostatic Potential and Capacitance4 · usually 2.2
Moving Charges and Magnetism4 · usually 2.1
Ray Optics and Optical Instruments4 · usually 2.5
Alternating Current3 · usually 1.4
Nuclei3 · usually 1.2
Semiconductor Electronics: Materials, Devices and Simple Circuits3 · usually 2.6
Units and Measurements3 · usually 1.9
Dual Nature of Radiation and Matter2 · usually 1.9
Electric Charges and Fields2 · usually 1.4
Electromagnetic Waves2 · usually 1.7
Gravitation2 · usually 1.8
Motion in a Plane2 · usually 0.6
Oscillations2 · usually 1.6
System of Particles and Rotational Motion2 · usually 2.4
Work, Energy and Power2 · usually 1.5
Electromagnetic Induction1 · usually 1.3
Kinetic Theory1 · usually 1.4
Laws of Motion1 · usually 1.9
Mechanical Properties of Fluids1 · usually 1.4
Motion in a Straight Line1 · usually 1.2
Thermal Properties of Matter1 · usually 1.0

Not asked this year: Wave Optics, Atoms.

More than usual

Moving Charges and Magnetism+1.54 questions · usually 2.1
Nuclei+1.53 questions · usually 1.2
Electrostatic Potential and Capacitance+1.44 questions · usually 2.2
Alternating Current+1.33 questions · usually 1.4
Motion in a Plane+1.22 questions · usually 0.6
Ray Optics and Optical Instruments+1.14 questions · usually 2.5
Units and Measurements+0.83 questions · usually 1.9
Electric Charges and Fields+0.52 questions · usually 1.4

Less than usual, or skipped

Wave Optics−1.5Not asked · usually 1.5
Atoms−1.3Not asked · usually 1.3
Laws of Motion−1.01 question · usually 1.9
System of Particles and Rotational Motion−0.62 questions · usually 2.4
Mechanical Properties of Fluids−0.51 question · usually 1.4
Kinetic Theory−0.51 question · usually 1.4
Electromagnetic Induction−0.41 question · usually 1.3
Motion in a Straight Line−0.31 question · usually 1.2

Every question

All 50 Physics questions of NEET 2021

Open any question for the full text, the options and the official answer. “New idea” means no earlier paper had tested it.

Subject

Difficulty

Idea

Find

50 of 50 questions

Physics50 questions

18 easy29 medium3 hard

Q1
A radioactive nucleus $\mathrm{^{A}_{Z}X}$ undergoes spontaneous decay in the sequence…
Nuclei Radioactive Decay Alpha Emission Z and A Changes
MediumOne-line MCQNew idea
Q2
Polar molecules are the molecules :
Electric Charges and Fields Coulomb's Law Polar and Non-Polar Molecules
EasyOne-line MCQNew idea
Q3
The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same…
Current Electricity Ohm's Law and Resistance Series Resistors and Voltage Divider
EasyNumericalNew ideaIdea asked in 3 papers
Q4
Column - I gives certain physical terms associated with flow of current through a metallic conductor. Column - II gives some mathematical…
Current Electricity Ohm's Law and Resistance Microscopic Model of Resistivity
MediumMatch the listsNew idea
Q5
The equivalent capacitance of the combination shown in the figure is :
Electrostatic Potential and Capacitance Capacitance Capacitors in Parallel
EasyFigure-basedNew idea
Q6
In a potentiometer circuit a cell of EMF 1.5 V gives balance point at 36 cm length of wire. If another cell of EMF 2.5 V replaces the…
Current Electricity Kirchhoff's Rules Comparing EMFs via Potentiometer
EasyNumericalNew idea
Q7
The escape velocity from the Earth's surface is $v$ . The escape velocity from the surface of another planet having a radius, four times…
Gravitation Escape Velocity
MediumOne-line MCQNew ideaIdea asked in 2 papers
Q8
A cup of coffee cools from 90°C to 80°C in t minutes, when the room temperature is 20°C. The time taken by a similar cup of coffee to cool…
Thermal Properties of Matter Calorimetry Radiation Correction in Calorimetry
MediumNumericalNew idea
Q9
A capacitor of capacitance 'C', is connected across an ac source of voltage V, given by $V = V_0 \sin\omega t$ The displacement current…
Electromagnetic Waves Displacement Current
MediumOne-line MCQIdea asked in 5 papers
Q10
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let $S_n$ be the distance travelled by the block…
Motion in a Straight Line Kinematics in 1D Displacement in the nth Second
MediumOne-line MCQNew ideaIdea asked in 2 papers
Q11
If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities. Find the dimensions of energy.
Units and Measurements Units and Dimensions Dimensional Formulas
MediumOne-line MCQNew idea
Q12
For a plane electromagnetic wave propagating in $x$ -direction, which one of the following combination gives the correct possible…
Electromagnetic Waves Transverse Nature and E x B Direction
MediumOne-line MCQIdea asked in 3 papers
Q13
A spring is stretched by 5 cm by a force 10 N. The time period of the oscillations when a mass of 2 kg is suspended by it is :
Oscillations Simple Harmonic Motion Horizontal Spring-Mass Time Period
EasyNumericalNew idea
Q14
A particle is released from height S from the surface of the Earth. At a certain height its kinetic energy is three times its potential…
Work, Energy and Power Work-Energy Theorem Conservation of Mechanical Energy
MediumOne-line MCQNew idea
Q15
A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since :
Ray Optics and Optical Instruments Prisms, Dispersion and Optical Instruments Astronomical Telescope
MediumOne-line MCQIdea asked in 3 papers
Q16
Two charged spherical conductors of radius $R_1$ and $R_2$ are connected by a wire. Then the ratio of surface charge densities of the…
Electrostatic Potential and Capacitance Capacitance Common Potential in Charge Sharing
MediumOne-line MCQNew idea
Q17
A convex lens 'A' of focal length 20 cm and a concave lens 'B' of focal length 5 cm are kept along the same axis with a distance 'd'…
Ray Optics and Optical Instruments Thin Lens Formula Combination of Lenses Separated by a Distance
MediumNumericalNew ideaIdea asked in 2 papers
Q18
An infinitely long straight conductor carries a current of 5 A as shown. An electron is moving with a speed of $10^{5}$ m/s parallel to…
Moving Charges and Magnetism Ampere's Circuital Law Force on Charge Moving Parallel to Wire
MediumNumerical · figureNew idea
Q19
If E and G respectively denote energy and gravitational constant, then $\frac{E}{G}$ has the dimensions of :
Units and Measurements Units and Dimensions Dimensions of Universal Constants
MediumOne-line MCQIdea asked in 2 papers
Q20
The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time.…
Mechanical Properties of Fluids Fluid Viscosity Terminal Velocity Calculation
MediumOne-line MCQNew idea
Q21
The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field…
Semiconductor Electronics: Materials, Devices and Simple Circuits Semiconductor Devices Intrinsic and Extrinsic Semiconductors
MediumOne-line MCQIdea asked in 2 papers
Q22
A thick current carrying cable of radius 'R' carries current 'I' uniformly distributed across its cross-section. The variation of magnetic…
Moving Charges and Magnetism Ampere's Circuital Law Field of Thick Conductor
MediumFigure-basedNew idea
Q23
A screw gauge gives the following readings when used to measure the diameter of a wire Main scale reading : 0 mm Circular scale reading :…
Units and Measurements Units and Dimensions Screw Gauge Measurements
EasyNumericalNew idea
Q24
The number of photons per second on an average emitted by the source of monochromatic light of wavelength 600 nm, when it delivers the…
Dual Nature of Radiation and Matter Photoelectric Effect Photon Emission Rate from Power
EasyNumericalNew idea
Q25
Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional force are 10% of the input…
Work, Energy and Power Work-Energy Theorem Power of a Water Pump
EasyNumericalNew idea
Q26
An electromagnetic wave of wavelength ' $\lambda$ ' is incident on a photosensitive surface of negligible work function. If 'm' mass is of…
Dual Nature of Radiation and Matter Photoelectric Effect De Broglie Wavelength of Emitted Photoelectron
MediumOne-line MCQNew idea
Q27
Match Column - I and Column - II and choose the correct match from the given choices. Column - I | Column - II (A) Root mean square speed…
Kinetic Theory Kinetic Theory of Gases Degrees of Freedom and Internal Energy
EasyMatch the listsIdea asked in 3 papers
Q28
A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented nuclei is…
Nuclei Nuclear Binding Energy Binding Energy per Nucleon
EasyNumericalNew idea
Q29
A parallel plate capacitor has a uniform electric field ' $\vec{E}$ ' in the space between the plates. If the distance between the plates is…
Electrostatic Potential and Capacitance Capacitance Electrostatic Energy Density
EasyOne-line MCQNew idea
Q30
Find the value of the angle of emergence from the prism. Refractive index of the glass is $\sqrt{3}$ .
Ray Optics and Optical Instruments Snell's Law Snell's Law Calculation
MediumFigure-basedIdea asked in 2 papers
Q31
A dipole is placed in an electric field as shown. In which direction will it move ?
Electric Charges and Fields Coulomb's Law Force Between Dipole and Point Charge
MediumFigure-basedNew idea
Q32
Consider the following statements (A) and (B) and identify the correct answer. (A) A zener diode is connected in reverse bias, when used…
Semiconductor Electronics: Materials, Devices and Simple Circuits Semiconductor Devices Zener Diode as Voltage Regulator
EasyOtherNew ideaIdea asked in 2 papers
Q33
The half-life of a radioactive nuclide is 100 hours. The fraction of original activity that will remain after 150 hours would be :
Nuclei Radioactive Decay Fraction Remaining After n Half-lives
EasyNumericalNew idea
Q34
An inductor of inductance L, a capacitor of capacitance C and a resistor of resistance 'R' are connected in series to an ac source of…
Alternating Current LCR Circuits Impedance Triangle Applications
EasyNumerical · figureNew idea
Q35
A body is executing simple harmonic motion with frequency 'n', the frequency of its potential energy is :
Oscillations Simple Harmonic Motion Frequency of Energy Oscillation
EasyOne-line MCQNew idea
Q36
From a circular ring of mass 'M' and radius 'R' an arc corresponding to a 90° sector is removed. The moment of inertia of the remaining…
System of Particles and Rotational Motion Rotational Motion Moment of Inertia of Standard Bodies
MediumOne-line MCQIdea asked in 3 papers
Q37
A series LCR circuit containing 5.0 H inductor, 80 $\mu$ F capacitor and 40 Ω resistor is connected to 230 V variable frequency ac source.…
Alternating Current LCR Circuits Half-Power Frequencies
HardNumericalNew idea
Q38
A uniform conducting wire of length 12a and resistance 'R' is wound up as a current carrying coil in the shape of, (i) an equilateral…
Moving Charges and Magnetism Magnetic Force on Charges and Currents Magnetic Moment of a Current Loop
MediumOne-line MCQNew ideaIdea asked in 2 papers
Q39
A step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the…
Alternating Current LCR Circuits Ideal Transformer
EasyNumericalNew ideaIdea asked in 3 papers
Q40
Twenty seven drops of same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.
Electrostatic Potential and Capacitance Capacitance Capacitance of an Isolated Spherical Conductor
MediumNumericalNew ideaIdea asked in 2 papers
Q41
Two conducting circular loops of radii $R_1$ and $R_2$ are placed in the same plane with their centres coinciding. If $R_1 >> R_2$ , the…
Electromagnetic Induction Faraday's Law Mutual Inductance of Concentric Circular Coils
MediumOne-line MCQNew idea
Q42
A particle of mass 'm' is projected with a velocity $v = kV_e$ (k < 1) from the surface of the earth. ( $V_e$ = escape velocity) The…
Gravitation Escape Velocity
HardOne-line MCQNew ideaIdea asked in 2 papers
Q43
A uniform rod of length 200 cm and mass 500 g is balanced on a wedge placed at 40 cm mark. A mass of 2 kg is suspended from the rod at 20…
System of Particles and Rotational Motion Rotational Motion Rotational Equilibrium
MediumNumerical · figureNew ideaIdea asked in 2 papers
Q44
A ball of mass 0.15 kg is dropped from a height 10 m, strikes the ground and rebounds to the same height. The magnitude of impulse…
Laws of Motion Newton's Laws of Motion Impulse of a Bouncing Ball
EasyNumericalNew ideaIdea asked in 2 papers
Q45
A particle moving in a circle of radius R with a uniform speed takes a time T to complete one revolution. If this particle were projected…
Motion in a Plane Projectile Motion Maximum Height
MediumOne-line MCQNew ideaIdea asked in 2 papers
Q46
For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal $y$ ?
Semiconductor Electronics: Materials, Devices and Simple Circuits Logic Gates Logic Gate Waveform Analysis
MediumFigure-basedNew idea
Q47
In the product $\vec{F} = q(\vec{v}\times\vec{B})$ $= q\vec{v}\times(B\hat{i}+B\hat{j}+B_0\hat{k})$ For q = 1 and…
Moving Charges and Magnetism Magnetic Force on Charges and Currents Magnetic Force on a Moving Charge
MediumNumericalNew idea
Q48
A car starts from rest and accelerates at 5 m/ $s^{2}$ . At t = 4 s, a ball is dropped out of a window by a person sitting in the car. What…
Motion in a Plane Projectile Motion Projectile from Horizontally Moving Platform
MediumNumericalNew idea
Q49
Three resistors having resistances $r_1$ , $r_2$ and $r_3$ are connected as shown in the given circuit. The ratio $\frac{i_3}{i_1}$ of…
Current Electricity Ohm's Law and Resistance Parallel Resistors and Current Divider
EasyFigure-basedIdea asked in 3 papers
Q50
A point object is placed at a distance of 60 cm from a convex lens of focal length 30 cm. If a plane mirror were put perpendicular to the…
Ray Optics and Optical Instruments Thin Lens Formula Thin Lens Formula Application
HardOne-line MCQ · figureNew idea

Questions from the official NEET UG 2021 paper (NTA). Chapter, topic and idea tags and difficulty are Lumi’s.

Physics in every NEET paper

NEET 2021 Chemistry NEET 2021 Biology The whole 2021 paper Physics across ten years