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Electromagnetic induction

Electromagnetic induction
Which of the following circuit elements will oppose the change in circuit current?

Capacitance
Resistance
Inductance
All of the listed here

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Electromagnetic induction
A conductor 2 meters 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

12 V
15 V
25 V
10 V

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Electromagnetic induction
Reversing the field or the current will reverse the force on the conductor.

Yes
No

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Electromagnetic induction
Both the number of turns and the core length of an inductive coil are doubled. Its self-inductance will be

Quadrupled
Unaffected
Halved
Doubled

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Electromagnetic induction
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

Mutual inductance
Self-inductance
Series aiding inductance
Capacitance

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Electromagnetic induction
A crack in the magnetic path of an inductor will result in

Unchanged inductance
Increased inductance
Reduced inductance
Zero inductance

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