NEET UG 2018 · Physics · 45 questions

NEET 2018 Physics, question by question

The NEET 2018 Physics section had 45 questions from 26 chapters: 14 easy, 30 medium and 1 hard. 31% were easy, 16 points below the 2017–2026 average for Physics, and 23 (51%) came from Class 12. System of Particles and Rotational Motion had the most, 4 questions.

Updated 2026-10-08

Questions: 45; 25% of the paper
Chapters asked: 26; 0 usual chapters skipped
Easy: 31%; 2017–2026 average 47%
From Class 12: 51%; 2017–2026 average 56%

The section

What Physics asked in 2018

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

Class 11 and 12

2223

Class 11
Class 12

Difficulty

1430

Easy
Medium
Hard

New ideas: 42 (93%)
Use a figure: 7

Question pattern

PHYSICS 2018

Calculation58%
Concept18%
Figure-based16%
Application7%
Recall2%

Chapters

The 2018 Physics chapter split

All 26 Physics chapters asked, and which got more or less than usual: the chapter’s ten-year average per 180 questions.

Every chapter asked

System of Particles and Rotational Motion4 · usually 2.4
Current Electricity3 · usually 3.2
Ray Optics and Optical Instruments3 · usually 2.5
Semiconductor Electronics: Materials, Devices and Simple Circuits3 · usually 2.6
Dual Nature of Radiation and Matter2 · usually 1.9
Gravitation2 · usually 1.8
Laws of Motion2 · usually 1.9
Moving Charges and Magnetism2 · usually 2.1
Wave Optics2 · usually 1.5
Waves2 · usually 0.9
Work, Energy and Power2 · usually 1.5
Alternating Current1 · usually 1.4
Atoms1 · usually 1.3
Electric Charges and Fields1 · usually 1.4
Electromagnetic Induction1 · usually 1.3
Electromagnetic Waves1 · usually 1.7
Electrostatic Potential and Capacitance1 · usually 2.2
Kinetic Theory1 · usually 1.4
Magnetism and Matter1 · usually 0.8
Mechanical Properties of Fluids1 · usually 1.4
Mechanical Properties of Solids1 · usually 0.7
Motion in a Straight Line1 · usually 1.2
Nuclei1 · usually 1.2
Oscillations1 · usually 1.6
Thermal Properties of Matter1 · usually 1.0
Units and Measurements1 · usually 1.9

More than usual

System of Particles and Rotational Motion+1.64 questions · usually 2.4
Waves+1.12 questions · usually 0.9
Wave Optics+0.52 questions · usually 1.5
Ray Optics and Optical Instruments+0.53 questions · usually 2.5
Work, Energy and Power+0.52 questions · usually 1.5
Semiconductor Electronics: Materials, Devices and Simple Circuits+0.43 questions · usually 2.6
Mechanical Properties of Solids+0.31 question · usually 0.7
Magnetism and Matter+0.21 question · usually 0.8

Less than usual, or skipped

Electrostatic Potential and Capacitance−1.21 question · usually 2.2
Units and Measurements−0.91 question · usually 1.9
Electromagnetic Waves−0.71 question · usually 1.7
Oscillations−0.61 question · usually 1.6
Mechanical Properties of Fluids−0.41 question · usually 1.4
Alternating Current−0.41 question · usually 1.4
Kinetic Theory−0.41 question · usually 1.4
Electric Charges and Fields−0.31 question · usually 1.4

Every question

All 45 Physics questions of NEET 2018

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

45 of 45 questions

Physics45 questions

14 easy30 medium1 hard

Q1
The volume (V) of a monatomic gas varies with its temperature (T), as shown in the graph. The ratio of work done by the gas, to the heat…
Thermodynamics Laws of Thermodynamics First Law in Isobaric Processes
MediumFigure-basedNew ideaIdea asked in 2 papers
Q2
The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ…
Waves Standing Waves, Organ Pipes and Beats Open Organ Pipe Harmonics
MediumNumericalNew ideaIdea asked in 3 papers
Q3
At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earth's atmosphere ? (Given : Mass…
Kinetic Theory Kinetic Theory of Gases RMS Speed of Molecules
MediumNumericalNew ideaIdea asked in 2 papers
Q4
The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is
Thermodynamics Carnot Engine Carnot Efficiency Formula
EasyNumericalNew idea
Q5
A carbon resistor of $(47 \pm 4.7)$ k $\Omega$ is to be marked with rings of different colours for its identification. The colour code…
Current Electricity Ohm's Law and Resistance Carbon Resistor Color Coding
EasyOne-line MCQNew ideaIdea asked in 3 papers
Q6
A set of 'n' equal resistors, of value 'R' each, are connected in series to a battery of emf 'E' and internal resistance 'R'. The current…
Current Electricity Ohm's Law and Resistance Parallel Resistors and Current Divider
MediumNumericalNew ideaIdea asked in 3 papers
Q7
A battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which are connected in series. The…
Current Electricity Ohm's Law and Resistance Short-Circuiting a Cell
MediumFigure-basedNew idea
Q8
Unpolarised light is incident from air on a plane surface of a material of refractive index ' $\mu$ '. At a particular angle of incidence…
Wave Optics Single Slit Diffraction Polarisation and Malus's Law
MediumOne-line MCQIdea asked in 5 papersAsked the year before
Q9
In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength $\lambda$ of the light used is 5896 Å and…
Wave Optics Young's Double Slit Angular Fringe Width
MediumNumericalNew ideaIdea asked in 2 papers
Q10
An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of
Ray Optics and Optical Instruments Prisms, Dispersion and Optical Instruments Astronomical Telescope
MediumOne-line MCQNew ideaIdea asked in 3 papers
Q11
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is
Atoms Bohr's Atomic Model Kinetic and Potential Energy Ratios
EasyOne-line MCQNew ideaIdea asked in 2 papers
Q12
An electron of mass m with an initial velocity $\vec{V} = V_0\hat{i}$ ( $V_0 > 0$ ) enters an electric field $\vec{E} = -E_0\hat{i}$ ( $E_0$ …
Dual Nature of Radiation and Matter Photoelectric Effect de Broglie Wavelength of Particles
MediumNumericalIdea asked in 4 papersAsked the year before
Q13
For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the…
Nuclei Radioactive Decay Fraction Decayed vs Fraction Remaining
EasyNumericalNew idea
Q14
When the light of frequency $2v_0$ (where $v_0$ is threshold frequency), is incident on a metal plate, the maximum velocity of electrons…
Dual Nature of Radiation and Matter Photoelectric Effect Maximum Velocity of Photoelectrons
EasyNumericalNew idea
Q15
In the circuit shown in the figure, the input voltage $V_i$ is 20 V, $V_{BE} = 0$ and $V_{CE} = 0$ . The values of $I_B$ , $I_C$ and $\beta$ …
Semiconductor Electronics: Materials, Devices and Simple Circuits Semiconductor Devices Bipolar Junction Transistor
MediumFigure-basedIdea asked in 3 papersAsked the year before
Q16
In a p-n junction diode, change in temperature due to heating
Semiconductor Electronics: Materials, Devices and Simple Circuits Semiconductor Devices p-n Junction V-I Characteristics
EasyOne-line MCQNew idea
Q17
In the combination of the following gates the output Y can be written in terms of inputs A and B as
Semiconductor Electronics: Materials, Devices and Simple Circuits Logic Gates XOR Gate Fundamentals
EasyFigure-basedNew idea
Q18
An em wave is propagating in a medium with a velocity $\vec{V} = V\hat{i}$ . The instantaneous oscillating electric field of this em wave…
Electromagnetic Waves Transverse Nature and E x B Direction
EasyOne-line MCQNew ideaIdea asked in 3 papers
Q19
The refractive index of the material of a prism is $\sqrt{2}$ and the angle of the prism is 30°. One of the two refracting surfaces of the…
Ray Optics and Optical Instruments Snell's Law Snell's Law Calculation
MediumNumericalNew ideaIdea asked in 2 papers
Q20
An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a distance of…
Ray Optics and Optical Instruments Spherical Mirrors Mirror Formula Application
MediumNumericalNew idea
Q21
The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of…
Electromagnetic Induction Faraday's Law Self Inductance
EasyNumericalNew ideaIdea asked in 3 papers
Q22
An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E. The direction of…
Electric Charges and Fields Coulomb's Law Charged Particle in a Uniform Electric Field
MediumOne-line MCQNew idea
Q23
The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is
Electrostatic Potential and Capacitance Capacitance Electrostatic Force Between Capacitor Plates
MediumOne-line MCQNew idea
Q24
A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable…
Waves Standing Waves, Organ Pipes and Beats Resonance Tube
MediumNumericalNew idea
Q25
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The…
Oscillations Simple Harmonic Motion Acceleration in SHM
EasyNumericalNew idea
Q26
A metallic rod of mass per unit length 0.5 kg m $^{-1}$ is lying horizontally on a smooth inclined plane which makes an angle of 30° with…
Moving Charges and Magnetism Magnetic Force on Charges and Currents Force on a Current-Carrying Conductor
MediumNumericalNew ideaIdea asked in 2 papers
Q27
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on,…
Magnetism and Matter Dia-, Para- and Ferromagnetism
HardOne-line MCQNew ideaIdea asked in 2 papers
Q28
An inductor 20 mH, a capacitor 100 $\mu$ F and a resistor 50 $\Omega$ are connected in series across a source of emf, V = 10 sin 314 t. The…
Alternating Current LCR Circuits Average Power Consumption
MediumNumericalNew idea
Q29
Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is…
Moving Charges and Magnetism Magnetic Force on Charges and Currents Moving-Coil Galvanometer Sensitivity
MediumNumericalNew idea
Q30
A body initially at rest and sliding along a frictionless track from a height h (as shown in the figure) just completes a vertical circle…
Work, Energy and Power Work-Energy Theorem Minimum Velocity for Vertical Circle
MediumFigure-basedNew idea
Q31
Three objects, A : (a solid sphere), B : (a thin circular disk) and C : (a circular ring), each have the same mass M and radius R. They…
System of Particles and Rotational Motion Rotational Motion Moment of Inertia of Standard Bodies
MediumOne-line MCQNew ideaIdea asked in 3 papers
Q32
A moving block having mass m, collides with another stationary block having mass 4m. The lighter block comes to rest after collision. When…
Work, Energy and Power Power and Collisions Coefficient of Restitution
MediumNumericalNew idea
Q33
Which one of the following statements is incorrect ?
Laws of Motion Friction Forces Laws of Limiting Friction
EasyOne-line MCQNew idea
Q34
A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field $\vec{E}$ . Due to…
Motion in a Straight Line Kinematics in 1D Average Velocity Special Cases
MediumNumericalNew idea
Q35
A block of mass m is placed on a smooth inclined wedge ABC of inclination $\theta$ as shown in the figure. The wedge is given an…
Laws of Motion Newton's Laws of Motion Stationary Block on an Accelerating Wedge
EasyFigure-basedNew idea
Q36
The moment of the force, $\vec{F} = 4\hat{i} + 5\hat{j} - 6\hat{k}$ at (2, 0, – 3), about the point (2, – 2, – 2), is given by
System of Particles and Rotational Motion Rotational Motion Torque as a Cross Product
EasyNumericalNew ideaIdea asked in 2 papers
Q37
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero…
Units and Measurements Units and Dimensions Screw Gauge Reading and Zero Error
MediumNumericalNew idea
Q38
A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same.…
System of Particles and Rotational Motion Rotational Motion Conservation of Angular Momentum
EasyOne-line MCQNew ideaIdea asked in 2 papers
Q39
The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are $K_A$ , $K_B$ and $K_C$ , respectively.…
Gravitation Kepler's Laws
MediumFigure-basedNew ideaIdea asked in 3 papers
Q40
If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the…
Gravitation Acceleration due to Gravity on a Planet
MediumOne-line MCQNew ideaIdea asked in 2 papers
Q41
A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy ( $K_t$ ) as well as rotational kinetic…
System of Particles and Rotational Motion Rotational Motion Kinetic Energy of Rolling Bodies
MediumNumericalNew ideaIdea asked in 2 papers
Q42
A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of…
Mechanical Properties of Fluids Fluid Viscosity Power Dissipation by Viscous Drag
MediumOne-line MCQNew idea
Q43
The power radiated by a black body is P and it radiates maximum energy at wavelength, $\lambda_0$ . If the temperature of the black body is…
Thermal Properties of Matter Heat Transfer and Thermal Expansion Wien's Displacement Law
MediumNumericalNew idea
Q44
Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has…
Mechanical Properties of Solids Elasticity Young's Modulus Calculation
MediumNumericalNew ideaIdea asked in 2 papers
Q45
A sample of 0.1 g of water at 100°C and normal pressure ( $1.013\times10^{5}$ Nm $^{-2}$ ) requires 54 cal of heat energy to convert to steam…
Thermodynamics Laws of Thermodynamics First Law in Boiling
MediumNumericalNew idea

Questions from the official NEET UG 2018 paper (CBSE). Chapter, topic and idea tags and difficulty are Lumi’s.

Physics in every NEET paper

NEET 2018 Chemistry NEET 2018 Biology The whole 2018 paper Physics across ten years