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Electromagnetic induction

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

Unchanged inductance
Increased inductance
Zero inductance
Reduced inductance

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

All of the listed here
Capacitance
Resistance
Inductance

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Electromagnetic induction
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will

None of the listed here
Increases
Decreases
Remains same

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

Cuts magnetic flux
Lies perpendicular to the magnetic flux
Moves parallel to the direction of the magnetic field
Lies in a magnetic field

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Electromagnetic induction
Two 300 uH coils in series without mutual coupling have a total inductance of

300 uH
1200 uH
900 uH
600 uH

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