Electromagnetic Induction Test

Question 1
1 / -0

When a metallic plate swings between the poles of a magnet

A
No effect on the plate

B
Eddy currents are set up inside the direction of the current is along the motion of the plate

C
Eddy currents are set up inside the plate and the direction of which oppose the motion of the plate

D
Eddy currents are set up inside the plate

Question 2
1 / -0

When a wire loop is rotated in a magnetic field, the frequency of change of direction of induced e.m.f changes once in each

A
1/4 revolution

B
1/2 revolution

C
1 revolution

D
2 revolution

Question 3
1 / -0

Mutual inductance of two coils can be increased by

A
Decreasing the number of turns in the coils

B
Increasing the number of turns in the coils

C
Winding the coils can on wooden core

D
None of above

Question 4
1 / -0

Which of the following is constructed on the principle of electromagnetic induction?

A
Galvanometer

B
Electric motor

C
Generator

D
Voltmeter

Question 5
1 / -0

The efficiency of transformer is very high because

A
There is no moving part in a transformer

B
It produces very high voltage

C
It produces very low voltage

D
None of above

Question 6
1 / -0

Assertion: Faraday’s laws are consequences of conservation of energy.

Reason: In a purely resistive ac circuit, the current lags behind the e.m.f in phase.

(A) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(B) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(C) If assertion is true but reason is false.

(D) If the assertion and reason both are false.

A
A

B
B

C
C

D
D

Submit Test

Electromagnetic...

Question 1

No effect on the plate

Eddy currents are set up inside the direction of the current is along the motion of the plate

Eddy currents are set up inside the plate and the direction of which oppose the motion of the plate

Eddy currents are set up inside the plate

Question 2

1/4 revolution

1/2 revolution

1 revolution

2 revolution

Question 3

Decreasing the number of turns in the coils

Increasing the number of turns in the coils

Winding the coils can on wooden core

None of above

Question 4

Galvanometer

Electric motor

Generator

Voltmeter

Question 5

There is no moving part in a transformer

It produces very high voltage

It produces very low voltage

None of above

Question 6

A

B

C

D

User

Question Analysis

Electromagnetic...

Question 1

No effect on the plate

Eddy currents are set up inside the direction of the current is along the motion of the plate

Eddy currents are set up inside the plate and the direction of which oppose the motion of the plate

Eddy currents are set up inside the plate

Question 2

1/4 revolution

1/2 revolution

1 revolution

2 revolution

Question 3

Decreasing the number of turns in the coils

Increasing the number of turns in the coils

Winding the coils can on wooden core

None of above

Question 4

Galvanometer

Electric motor

Generator

Voltmeter

Question 5

There is no moving part in a transformer

It produces very high voltage

It produces very low voltage

None of above

Question 6

A

B

C

D

User

Question Analysis

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