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Electromagnetic induction

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

False
True

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Electromagnetic induction
A coil is wound on iron core which carries current I. The self-induced voltage in the coil is not affected by

The resistance of magnetic path
Change of number of turns of coil
Variation in coil current
Variation in voltage to the coil

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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?

None of the listed here
0.2 s
0.5 s
0.1 s

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Electromagnetic induction
Which of the following circuit element stores energy in the electromagnetic field?

Variable resistor
Resistance
Inductance
Condenser

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Electromagnetic induction
Air-core coils are practically free from

Both Hysteresis losses & Eddy current losses
Eddy current losses
None of the listed here
Hysteresis losses

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Electromagnetic induction
Which of the following is not a unit of inductance?

Hennry
All of the listed here
Coulomb/volt ampere
Volt second per ampere

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