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Electromagnetic induction

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

Increased inductance
Unchanged inductance
Zero inductance
Reduced inductance

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Electromagnetic induction
Which circuit element(s) will oppose the change in circuit current?

Capacitance only
Inductance and capacitance
Inductance only
Resistance only

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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

Self-inductance
Mutual inductance
Series aiding inductance
Capacitance

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Electromagnetic induction
An e.m.f. of 16 volts is induced in a coil of inductance 4H. The rate of change of current must be

16 A/s
4 A/s
12 A/s
20 A/s

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Electromagnetic induction
If current in a conductor increases then according to Lenz's law self-induced voltage will

Aid the increasing current
Produce current opposite to the increasing current
Aid the applied voltage
Tend to decrease the amount of current

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Electromagnetic induction
The self-inductance of the coil may be defined as equal to the e.m.f. induced in volts when the current in the circuit changes at the rate of unit Weber turns.

No
Yes

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