NEET PhysicsUpdated 19 Oct 2026

Electromagnetic Induction: NEET PYQs and weightage

Electromagnetic Induction carries 2.6 of 100 Physics marks in NEET by past-paper share: 20 of the 758 tagged NEET Physics PYQs in the ViJEEta bank (NEET 2013–2026). It ranks 22 of 30 Physics chapters.

Take the 25-question Electromagnetic Induction test Formula sheet ↓All NEET Physics chapters

2.6/100 Weight in Physics

Exam importance (3/5, by past-paper share)

20 NEET PYQs

333 Practice questions

316 With measured difficulty

How the weight is computed: this chapter's tagged NEET PYQs divided by all tagged NEET Physics PYQs in the bank (20 of 758), times 100, with repeated questions counted once. The bank does not store the year of each NEET question, so none is printed. Computed from the bank at build time. Updated 19 Oct 2026.

Electromagnetic Induction: formula sheet for NEET

14 formulas, each with when to use it. Copy it onto one page of your notebook: that page is this chapter's handbook.

Magnetic flux
$Φ = B \cdot A = B A cos θ (θ is between B and the area vector, the normal to the coil; 1 Wb = 1 T m^{2})$
Use it when: you need the flux through a flat coil in a uniform field before finding any emf
Faraday's law
$ε = - N \frac{d Φ}{d t}$
Use it when: the flux through an $N$ -turn coil changes because of $B$ , area or angle
Average emf and current
$∣ ε ∣ = N \frac{ΔΦ}{Δ t}$
$I = \frac{ε}{R}$
Use it when: $B$ or orientation changes over a given time interval and you need the size of the emf and current
Motional emf
$ε = B l v$
Use it when: a rod of length $l$ moves with speed $v$ , with $l$ , $v$ and $B$ all mutually perpendicular
Rotating rod or spoke
$ε = \frac{1}{2} B ω R^{2} (ω = 2 π ν; 1 G = 1 0^{- 4} T)$
Use it when: a rod rotates about one end in a field parallel to the axis. For a wheel, the number of spokes does not matter because the spokes are in parallel
AC generator
$ε = N B A ω sin ω t$
$ε_{0} = N B A ω = N B A (2 π ν)$
Use it when: an $N$ -turn coil spins at $ω$ about an axis perpendicular to $B$ (coil perpendicular to the field at $t = 0$ )
Mutual inductance
$N_{1} Φ_{1} = M I_{2}$
$ε_{1} = - M \frac{d I _{2}}{d t}$
$M_{12} = M_{21}$
Use it when: a changing current in one coil induces an emf in a neighbouring coil
M of two long coaxial solenoids
$M = μ_{r} μ_{0} n_{1} n_{2} π r_{1}^{2} l (r_{1} = radius of the inner solenoid)$
Use it when: one long solenoid sits inside another of the same length $l$
M of two concentric coplanar loops
$M = \frac{μ _{0} π r _{1}^{2}}{2 r _{2}} (r_{1} ≪ r_{2})$
Use it when: a small loop sits at the centre of a large loop, both coaxial
Self-inductance
$N Φ = L I$
$ε = - L \frac{d I}{d t}$
Use it when: a coil's own changing current induces a back emf in it
L of a long solenoid
$L = μ_{r} μ_{0} n^{2} A l (n = turns per unit length, not total turns)$
Use it when: you need $L$ from the solenoid's geometry and core material
Two coils carrying current
$ε_{1} = - L_{1} \frac{d I _{1}}{d t} - M \frac{d I _{2}}{d t}$
Use it when: both coils carry changing currents at the same time
Energy stored in an inductor
$U = \frac{1}{2} L I^{2}$
Use it when: you need the work done to build up current $I$ in a coil
Magnetic energy density
$u = \frac{B ^{2}}{2 μ _{0}}$
Use it when: you need the energy per unit volume in a region with field $B$

Trap

In Φ = BA cos θ, θ is measured from the normal to the coil, not from its plane. A coil whose plane is perpendicular to B has θ = 0 and maximum flux. Flipping such a coil through 180° gives ΔΦ = 2BA, not zero.

How does NEET ask Electromagnetic Induction?

8 real previous-year questions from this chapter, as printed in the paper, each with its worked solution. Answer the first one here with no sign-in.

Q1PhysicsNEET UG PYQMagnetic Flux and Faraday's Law of Induction

Try right here · No sign-in

A long solenoid of diameter 0.1 m has 2×10

^{4}

turns per meter. At the center of the solenoid, a coil of 100 turns and radius 0.01 m is placed with its axis coinciding with the solenoid axis. The current in the solenoid reduces at a constant rate to 0 A from 4 A in 0.05 s. If the resistance of the coil is 10π

^{2}

Ω, the total charge flowing through the coil during this time is

Answer key (A) & worked solution

Correct answer: Option A

ε = - N \frac{d ϕ}{d t}

\frac{ε}{R} = \frac{N}{R} \frac{d ϕ}{d t}

(as

i = \frac{d q}{d t}

)

d q = \frac{N}{R} d ϕ

d q = \frac{N ( d ϕ )}{R}

d q = \frac{d ϕ _{t o t a l}}{R}

= \frac{( N B A )}{R}

d q = \frac{μ _{0} niπ r ^{2}}{R}

Putting values

= \frac{4 π \times 10 ^{- 7} \times 2 \times 10 ^{4} \times 100 \times 4 \times π \times ( 0.01 ) ^{2}}{10 π ^{2}} \Rightarrow d q = 32 μ C

Q2PhysicsNEET UG PYQLenz's Law & Its Applications

A sheet is placed on a horizontal surface in front of a strong magnetic pole. A force is needed to: A. hold the sheet there if it is magnetic B. hold the sheet there if it is non-magnetic. C. Move the sheet away from the pole with uniform velocity if it is conducting. D. Move the sheet away from the pole with uniform velocity if it is both, non-conducting and non-polar Choose the correct statement(s) from the options given below

AA and C only

BA, C and D only

CC only

DB and D only

Answer key (A) & worked solution

Correct answer: Option A

A. A magnetic pole will repel or attract magnetic sheet so force is need.B. If sheet is non-magnetic, no force needed.C. If it is conducting, then there will be addy current in sheet, which opposes the motion. So forces is needed move sheet with uniform speed.D. The non-conducting and non-polar sheet do not interact with magnetic field of magnet.

Q3PhysicsNEET UG PYQInductance

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 inductance

A1.389 H

B138.88 H

C0.138 H

D13.89 H

Answer key (D) & worked solution

Correct answer: Option D

Energy stored in inductor

U = \frac{1}{2} L I^{2}

25 \times 1 0^{- 3} = \frac{1}{2} \times L \times (60 \times 10^{- 3})^{2}

L = \frac{252 \times 10 ^{6} \times 10 ^{- 3}}{3600}

= \frac{500}{36}

= 13.89 H

Q4PhysicsNEET UG PYQInductance

A long solenoid has 1000 turns. When a current of 4A flows through it, the magnetic flux linked with each turn of the solenoid is 4 × 10−3Wb. The self inductance of the solenoid is

A4H

B3H

C2H

D1H

Answer key (D) & worked solution

Correct answer: Option D

Flux linked with each turn = 4 × 10−3 Wb

∴

Total flux linked = 1000[4 × 10−3 Wb

ϕ_{t o t a l} = 4 \Rightarrow L i = 4 \Rightarrow L = 1 H

Q5PhysicsNEET UG PYQInductance

The magnetic energy stored in an inductor of inductance 4

μ H

carrying a current of 2 A is :

4 m J

8 m J

8 μ J

4 μ J

Answer key (C) & worked solution

Correct answer: Option C

Energy

= \frac{1}{2} L i^{2}

= \frac{1}{2} 4 \times 1 0^{- 6} \times 2^{2}

= 8 \times 1 0^{- 6} J

Energy

= 8 μ J

Q6PhysicsNEET UG PYQLenz's Law & Its Applications

In which of the following devices, the eddy current effect in not used?

Amagnetic braking in train

Belectromagnetic damping

Cordinary electric heater

Dinduction furnace

Answer key (C) & worked solution

Correct answer: Option C

Electric heater does not involve Eddy currents. It uses Joule's heating effect

Q7PhysicsNEET UG PYQInductance

Consider a long solenoid of length

I

and radius

r

. If

n

is the number of turns per unit length and

μ_{0}

is the permeability of free space, the inductance of the solenoid is :

μ 0 n^{2} r^{2} I

(μ_{0} /2 π) n^{2} r^{2} /

2 μ_{0} π n^{2} r^{2} I

μ_{0} π n^{2} r^{2} I

Answer key (D) & worked solution

Correct answer: Option D

Self inductance of solenoid

L = \frac{N ϕ}{i} L = \frac{N B A}{i} L = \frac{N μ _{0} ni A}{i} [n = \frac{N}{l}] L = N μ_{0} n A L = (\frac{N}{I}) μ_{0} n A I L = μ_{0} n^{2} A I L = μ_{0} n^{2} π r^{2} I [∵ A = π r^{2}]

Q8PhysicsNEET UG PYQMotional Electromotive Force

A rectangular wire loop of sides 8 cm and 3 cm with a small cut, is moving out of a region of uniform magnetic field of magnitude 0.3 T directed normal to the plane of the loop. The emf developed across the cut, if the velocity of the loop is

2 cm s^{- 1}

, in a direction normal to the shorter side of the loop, will be :

1.8 \times 1 0^{- 4}

volt

1.2 \times 1 0^{- 4}

volt

1.3 \times 1 0^{- 4}

volt

4.8 \times 1 0^{- 4}

volt

Answer key (A) & worked solution

Correct answer: Option A

Induced emf across the shorter side

E_{induced} = B v l [∵ B ⊥ V ⊥ I] = 0.3 \times 2 \times 1 0^{- 2} \times 3 \times 1 0^{- 2} = 1.8 \times 1 0^{- 4} V = 1.8 \times 1 0^{- 4} volt

Which topics in Electromagnetic Induction carry the most questions?

All 6 topics, by tagged PYQs, then practice questions. Counted from the bank. Updated 19 Oct 2026.

Topic	PYQs	Practice questions
Inductance	8	137
Magnetic Flux and Faraday's Law of Induction	7	105
Lenz's Law & Its Applications	3	36
Motional Electromotive Force	2	51
AC Generator	0	3
Miscellaneous Examples	0	1

Why does Electromagnetic Induction show "–" until you answer 3 questions?

Unknown is not zero. Until you answer at least 3 graded questions in Electromagnetic Induction, ViJEEta shows – instead of a zero or a 50% default. Book exercises can raise chapter mastery up to 0.60, adaptive practice up to 0.75, and only a timed chapter test or mock can certify 0.80 and above.

How ViJEEta scores you

What happens when you test Electromagnetic Induction?

Every chapter test is 25 questions. It starts at moderate difficulty and adapts after each saved answer. If you open a solution before answering, that attempt earns no credit, so your mastery stays honest.

Start the Electromagnetic Induction test

Chapters either side of Electromagnetic Induction by weight

Motion in a Straight Line Weight 2.8/100 Electric Charges and Fields Weight 2.6/100 Electromagnetic Waves Weight 2.6/100 Motion in a Plane Weight 2.4/100

Electromagnetic Induction: NEET PYQs and weightage

Electromagnetic Induction: formula sheet for NEET

Magnetic flux

Faraday's law

Average emf and current

Motional emf

Rotating rod or spoke

AC generator

Mutual inductance

M of two long coaxial solenoids

M of two concentric coplanar loops

Self-inductance

L of a long solenoid

Two coils carrying current

Energy stored in an inductor

Magnetic energy density

How does NEET ask Electromagnetic Induction?

Which topics in Electromagnetic Induction carry the most questions?

Why does Electromagnetic Induction show "–" until you answer 3 questions?

What happens when you test Electromagnetic Induction?

Chapters either side of Electromagnetic Induction by weight