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Electromagnetic induction

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

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

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Electromagnetic induction
A conductor 2 meters long moves at right angles to a magnetic field of flux density 1 tesla with a velocity of 12.5 m/s. The induced e.m.f. in the conductor will be

25 V
10 V
12 V
15 V

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Electromagnetic induction
Mutually inductance between two magnetically coupled coils depends on

The number of their turns
All of the listed here
Cross-sectional area of their common core
Permeability of the core

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Electromagnetic induction
A conductor carries 125 amperes of current under 60° to a magnetic field of 1.1 tesla. The force on the conductor will be nearly

60 N
30 N
120 N
90 N

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

Yes
No

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

False
True

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MORE MCQ ON Electromagnetic induction

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