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Electromagnetic induction

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.

Yes
No

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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

Remains same
Increases
None of the listed here
Decreases

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Electromagnetic induction
The law that the induced e.m.f. and current always oppose the cause producing them is due to

Coulomb
Faraday
Newton
Lenz

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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 coefficient of coupling between two air core coils depends on

Self-inductance of two coils only
Mutual inductance and self inductance of two coils
None of the listed here
Mutual inductance between two coils only

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

Zero inductance
Reduced inductance
Increased inductance
Unchanged inductance

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