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Electromagnetic induction

Electromagnetic induction
Two coils have inductances of 8 mH and 18 mH and a coefficient of coupling of 0.5. If the two coils are connected in series aiding, the total inductance will be

48 mH
36 mH
30 mH
38 mH

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Electromagnetic induction
A moving magnetic field will produce the same effect as a conductor that is moving.

True
False

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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
Self-inductance
Series aiding inductance
Mutual inductance

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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?

0.5 s
0.1 s
None of the listed here
0.2 s

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Electromagnetic induction
The self inductances of two coils are 8 mH and 18 mH. If the coefficient of coupling is 0.5, the mutual inductance of the coils is

36 mH
6 mH
18 mH
12 mH

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Electromagnetic induction
Increasing the field or increasing the current will decrease the force on the conductor.

No
Yes

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