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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
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
Mutual inductance
Series aiding inductance

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Electromagnetic induction
If current in a conductor increases then according to Lenz's law self-induced voltage will

Produce current opposite to the increasing current
Tend to decrease the amount of current
Aid the increasing current
Aid the applied voltage

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Electromagnetic induction
Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla

400 N
1000 N
300 N
100 N

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Electromagnetic induction
Which of the fpllowing inductor will have the least eddy current losses ?

Powdered iron core
Iron core
Air core
Laminated iron core

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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
0.5 s
0.2 s
None of the listed here

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