# Electromagnetic Induction MCQ Part 3

## Electromagnetic Induction MCQ Part 3 Category –EE Online Test

Attempt Free Electromagnetic Induction MCQ Part 3 Here. Read The Important Electrical MCQ From Below.

Q1. A 200 turn coil has an inductance of 12 mH. If the number of turns is increased to 400 turns, all other quantities (area, length etc.) remaining the same, the inductance will be

A.  6 mH
B.  14 mH
C.  24 mH
D.  48 mH

Ans. D

Q2. A conductor 2 metres long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5
m/s. The induced e.m.f. in the conductor will be

A.  10 V
B.  15 V
C.  25 V
D.  50 V

Ans. C

Electromagnetic Induction MCQ Part 3

Q3. A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is

A.  3500 mH
B.  350 mH
C.  250 mH
D.  150 mH

Ans. B

Q4. As per Faraday’s laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it

A.  lies perpendicular to the magnetic flux
B.  lies in a magnetic field
C.  cuts magnetic flux
D.  moves parallel to the direction of the magnetic field

Ans. C

Electromagnetic Induction MCQ Part 3

Q5. If current in a conductor increases then according to Lenz’s law self-induced voltage will

A.  aid the increasing current
B.  tend to decrease the amount of current
C.  produce current opposite to the increasing current
D.  aid tite applied voltage

Ans. C

Q6. In case of an inductance, current is proportional to

A.  voltage across the inductance
B.  magnetic field
C.  both (a) and (b)
D.  neither (a) nor (b)

Ans. B

Electromagnetic Induction MCQ Part 3

Q7. Two coils have self-inductance of 10 H and 2 H, the mutual inductance being zero. If the two coils are connected in series, the total inductance will be

A.  6 H
B.  8 H
C.  12 H
D.  24 H

Ans. C

Q8. Lenz’s law is a consequence of the law of conservation of

A.  induced current
B.  charge
C.  energy
D.  induced e.m.f.

Ans. C

Electromagnetic Induction MCQ Part 3

Q9. The property of coil by which a counter e.m.f. is induced in it when the current through the coil changes is known as

A.  self-inductance
B.  mutual inductance
C.  series aiding inductance
D.  capacitance

Ans. A

Q10. The direction of induced e.m.f. can be found by

A.  Laplace’s law
B.  Lenz’s law
C.  Fleming’s right hand rule
D.  Kirchhoffs voltage law

Ans. B

Electromagnetic Induction MCQ Part 3