# Electromagnetic Induction MCQ Questions Class 12 Physics Chapter 6

Electromagnetic Induction MCQ Questions Class 12 Physics Chapter 6

NCERT MCQ Questions for Class 12 Physics Chapter 6 Electromagnetic Induction. Electromagnetic Induction MCQ Questions with Answers from Class 12 Physics.

## Electromagnetic Induction MCQ Questions Class 12 Physics Chapter 6

Electromagnetic Induction Multiple Choice Questions with Answers Class 12 Physics Chapter 6 PDF is available.

1) The relative motion between the magnet and the coil that is responsible for generation of

a) Magnetic field in the coil

b) Current in the coil

c) Voltage in the coil

d) None

Ans: b) current in the coil

2) Magnetic flux is the

a) Vector quantity

b) Scalar quantity

c) Tensor quantity

d) None

Ans: b) scalar quantity

3) The SI unit of magnetic flux is

a) Weber

b) Tm2

c) Tesla

d) Both a and b

Ans: d) both a and b

4) The magnitude of the induced emfin a circuit is equal to the time rate of change of ____ through the coil.

a) Magnetic moment

b) Magnetic field

c) Magnetic susceptibility

d) Magnetic flux

Ans: d) magnetic flux

5) The magnitude of the induced emf in a circuit is equal to the time rate of change of magnetic flux through the coil, this is the

a) Lenz’s law

b) Faraday’s law of electromagnetic induction

c) Both a and b

d) Gauss’s law

Ans: b) Faraday’s law of electromagnetic induction

6) The polarity not induced emf is such that it tends to produce a current which opposes the change in magnetic flux that produced it, this is

a) Faraday’s law of electromagnetic induction

b) Lenz’s law

c) Both a and b

d) None

Ans: b) Lenz’s law

7) The induced emfBlv is called as

a) Rotational emf

b) Motional emf

c) Magnetic emf

d) Induced emf

Ans: b) motional emf

8) The advantages of eddy currents are used in applications

a) Magnetic braking in trains

b) Electromagnetic damping

c) Induction furnace

d) All

Ans: d) all

9) Inductance is the

a) Scalar quantity

b) Vector quantity

c) Both a and b

d) None

Ans: a) scalar quantity

10) The dimensions of inductance are

a) [M L2 T-2 A-2]

b) [M L-2 T-2 A-2]

c) [M L T-2 A-2]

d) None

Ans: b) [M L-2 T-2 A-2]

11) The SI unit of inductance is

a) Ohm

c) Henry

d) Weber

Ans: c) Henry

12) The production of induced emfin a single coil due to change of flux through the coil by means of varying current through the same coil, this is called as

a) Mutual induction

b) Self induction

c) Both a and b

d) None

Ans: b) self induction

13) The self inductance L of the coil is also called as

a) Coefficient of self induction of the coil

b) Coefficient of mutual induction of coil

c) Self induction

d) None

Ans: a) coefficient of self induction of the coil

14) The self inductance of the coil depends on the

a) Geometry

b) Permeability of the medium

c) Both a and b

d) None

Ans: c) both a and b

15) AC generator converts

a) Electrical energy into mechanical energy

b) Electrical energy into thermal energy

c) Mechanical energy into electrical energy

d) None

Ans: c) mechanical energy into electrical energy

16) The current whose direction changes periodically is called as

a) Direct current

b) Eddy current

c) Focault’s current

d) Alternating current

Ans: d) alternating current

17) Large dams are the source of

a) Chemo electric generators

b) Hydro electric generators

c) Thermo electric generators

d) None

Ans: b) hydro electric generators

18) The generators in which steam at high pressure produces the rotation of the armature are called as

a) Thermal generators

b) Nuclear power generators

c) Hydro electric generators

d) Thermo electric generators

Ans: a) thermal generators

19) If nuclear file is used to generate electricity in the generators then they are called as

a) Thermal generators

b) Hydro electric generators

c) Nuclear power generators

d) None

Ans: c) nuclear power generators

20) The frequency of AC current in India is about

a) 20Hz

b) 30Hz

c) 500Hz

d) 50Hz

Ans: d) 50Hz

21) The frequency of AC current in the USA is about

a) 50Hz

b) 30Hz

c) 60Hz

d) 40Hz

Ans: c) 60Hz

22) The magnetic flux through a surface of area A placed in a uniform magnetic field B is given by

a) BAsinx

b) BA Cosx

c) BA

d) None

Ans: b) BA Cosx

23) When a metal rod of length l is placed normal to uniform magnetic field B and moved with a velocity v perpendicular to the field then emf induced across its ends is given by

a) Blv

b) Blv2

c) Bl2v

d) None

Ans: a) Blv

24) Changing magnetic field set up the current loops nearby metal bodies and dissipate electrical energy as heat, such currents are called as

a) Conventional current

b) AC current

c) DC current

d) Eddy current

Ans: d) eddy currents

25) The ratio of flux linkage to the current is called as

a) Capacitance

b) Inductance

c) Induction

d) None

Ans: b) inductance

26) The self inductance of the coil is the measure of the _____ of the coil against the change of current through the coil.

a) Weight

b) Inertia

c) Force

d) Magnetic field

Ans: b) inertia

27) The emf induced is measured in

a) Ampere

b) Ohm

c) Weber

d) Volt

Ans: d) volt

28) Mutual inductance is measured in

a) Ohm

c) Henry

d) Tesla

Ans: c) Henry

29) Self inductance is measured in

a) Ohm

c) Henry

d) Tesla

Ans: c) Henry

30) The dimensions of emf are given by

a) [M L T-3 A-1]

b) [M L2 T-3 A-1]

c) [M L2 T-2 A-1]

d) [M L2 T-2 A-3]

Ans: b) [M L2 T-3 A-1]

31) The dimensions of self inductance and mutual inductance are given by

a) [M L2 T-3 A-2]

b) [M L-2 T-2 A-2]

c) [M L2 T-2 A-2]

d) [M L2 T-2 A-2]

Ans: d) [M L2 T-2 A-2]

Updated: April 12, 2023 — 10:31 am