Electromagnetic Induction NEET Questions with Solutions

Q: How many questions come from Electromagnetic Induction in NEET 2027?

You can expect 1 to 2 questions in NEET 2027. The chapter has high PYQ frequency. Faraday's law applications, motional EMF, Lenz's law direction, self-inductance and energy stored in an inductor are favourites.

Q: What is Faraday's law of induction?

Whenever the magnetic flux through a closed loop changes, an EMF is induced in the loop equal to minus the rate of change of flux. epsilon equals minus d Phi over dt. For N turns, multiply by N. The induced EMF drives a current if the loop is closed.

Q: What is Lenz's law?

The direction of the induced current is such that it OPPOSES the change in flux that produced it. This is the meaning of the negative sign in Faraday's law. Lenz's law follows from energy conservation: if the induced current aided the change, you could create energy out of nothing.

Q: What is motional EMF?

A conducting rod of length L moving with velocity v perpendicular to a magnetic field B (with v perpendicular to L) develops EMF epsilon equals B L v across its ends. This is induced EMF without any time-varying field; the change of flux comes from the rod sweeping out new area.

Q: What are eddy currents?

Currents induced in bulk pieces of conductor by a changing flux. They form swirling loops, hence the name. Eddy currents heat up the conductor, dissipating energy. They are useful in induction stoves and magnetic braking, and undesirable in transformer cores (laminations reduce them).

Q: What is self-inductance?

When the current through a coil changes, the changing flux through itself induces a back EMF. epsilon equals minus L di over dt. L is the self-inductance, in henries (H). For a long solenoid, L equals mu_0 N squared A over length.

Q: What is the energy stored in an inductor?

Building up current I from zero in an inductor requires work, which is stored in the magnetic field. U equals half L I squared. Energy density (in vacuum) is u equals B squared over (2 mu_0).

Question 1

A thin semicircular conducting ring (PQR) of radius 'r' is falling with its plane vertical in a horizontal magnetic field B. The potential difference developed across the ring when its speed is v, is:

Accepted Answer

2rBv and R is at higher potential

Question 2

A rectangular coil of length 0.12 m and width 0.1 m having 50 turns of wire is suspended vertically in a uniform magnetic field of strength 0.2 Weber m2⁄ . The coil carries a current of 2A. if the pla

Accepted Answer

0.20 Nm

Question 3

A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves :

Accepted Answer

A condition of no current flow through the galvanometer

Question 4

Figure shows a circuit contains three identical resistors with resistance R = 9.0 Ω each, two identical inductors with inductance L = 2.0 mH each, and an ideal battery with emf ε = 18 V. The current '

Accepted Answer

2 A

Question 5

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

Accepted Answer

13·89 H

ACHLA/AA/Page 5 SPACE FOR ROUGH WORK English

Question 6

A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is ( 𝑎𝐶𝑢= 1.7 × 10—5 𝐾—1 and 𝑎𝐴𝑙=

Accepted Answer

68 cm

Question 7

An electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is, (nearly) : (me = 9 × 10−31 Kg)

Accepted Answer

12.2 × 10−12 m

Question 8

The solids which have the negative temperature coefficient of resistance are :

Accepted Answer

insulators and semiconductors

Question 9

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 mutual inductance M between them will be directly proportional to :

Accepted Answer

2 1 R R

Question 10

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 triangle of side ‘a’. (ii) a square of side ‘a’. The magnetic dipo

Accepted Answer

3 Ia 2 and Ia 2

Question 11

The dimensions [MLT–2A–2] belong to the

Accepted Answer

Magnetic permeability

Question 12

A square loop of side 1 m and resistance 1 Ω is placed in a magnetic field of 0.5 T. If the plane of loop is perpendicular to the direction of magnetic field, the magnetic flux through the loop is

Accepted Answer

0.5 weber

Question 13

The magnetic energy stored in an inductor of inductance 4 μH carrying a current of 2 A is :

Accepted Answer

8 μJ

Question 14

In the above diagram, a strong bar magnet is moving towards solenoid -2 from solenoid -1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the direction

Accepted Answer

AB and DC

Question 15

In an ideal transformer, the turns ratio is 1 2 P S N N = . The ratio VS : VP is equal to (the symbols carry their usual meaning) :

Accepted Answer

2 : 1

Question 16

A parallel plate capacitor made of circular plates is being charged such that the surface charge density on its plates is increasing at a constant rate with time. The magnetic field arising due to dis

Accepted Answer

Non-zero everywhere with maximum at the imaginary cylindrical surface connecting peripheries of the plates

Electromagnetic InductionNEET Physics · Class 12 · NCERT Chapter 6

More NEET questions, next chapter

Track Your NEET Score Across All 90 Chapters

Electromagnetic InductionNEET Physics · Class 12 · NCERT Chapter 6

1NEET 2014Medium4 bookletsA thin semicircular conducting ring (PQR) of radius 'r' is falling with its plane vertical in a horizontal magnetic field B. The potential difference developed across the ring when its speed is v, is:

3NEET 2017Medium5 bookletsA potentiometer is an accurate and versatile device to make electrical measurements of E.M.F, because the method involves :

5NEET 2018Medium19 bookletsThe 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

6NEET 2019Medium4 bookletsA copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is ( 𝑎𝐶𝑢= 1.7 × 10—5 𝐾—1 and 𝑎𝐴𝑙= 2.2 × 10—5 𝐾—1)

7NEET 2019Medium4 bookletsAn electron is accelerated through a potential difference of 10,000 V. Its de Broglie wavelength is, (nearly) : (me = 9 × 10−31 Kg)

8NEET 2020Medium24 bookletsThe solids which have the negative temperature coefficient of resistance are :

9NEET 2021Medium24 bookletsTwo 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 mutual inductance M between them will be directly proportional to :

10NEET 2021Medium24 bookletsA uniform conducting wire of length 12a and resistance ‘R’ is wound up as a current carrying coil in the shape of, (i) an equilateral triangle of side ‘a’. (ii) a square of side ‘a’. The magnetic dipole moments of the coil in each case respectively are :

11NEET 2022Medium24 bookletsThe dimensions [MLT–2A–2] belong to the

12NEET 2022Medium24 bookletsA square loop of side 1 m and resistance 1 Ω is placed in a magnetic field of 0.5 T. If the plane of loop is perpendicular to the direction of magnetic field, the magnetic flux through the loop is

13NEET 2023Medium24 bookletsThe magnetic energy stored in an inductor of inductance 4 μH carrying a current of 2 A is :

14NEET 2024Medium23 bookletsIn the above diagram, a strong bar magnet is moving towards solenoid -2 from solenoid -1. The direction of induced current in solenoid-1 and that in solenoid-2, respectively, are through the directions:

15NEET 2024Medium22 bookletsIn an ideal transformer, the turns ratio is 1 2 P S N N = . The ratio VS : VP is equal to (the symbols carry their usual meaning) :

16NEET 2025Medium4 bookletsA parallel plate capacitor made of circular plates is being charged such that the surface charge density on its plates is increasing at a constant rate with time. The magnetic field arising due to displacement current is:

More NEET questions, next chapter

Track Your NEET Score Across All 90 Chapters