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Electromagnetic induction

Electromagnetic induction
In case all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be

2.5
2.0
0.5
1.0

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Electromagnetic induction
A 500 turns solenoid develops an average induced voltage of 60 V. Over what time interval must a flux change of 0.06 Wb occur to produce such a voltage?

0.1 s
0.2 s
0.5 s
None of the listed here

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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

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

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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

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

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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

Capacitance
Series aiding inductance
Mutual inductance
Self-inductance

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Electromagnetic induction
Lenz's law is a consequence of the law of conservation of

Induced current
Energy
Induced e.m.f.
Charge

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