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Electromagnetic induction

Electromagnetic induction
A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is

350 mH
3500 mH
250 mH
None of the listed here

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

Laminated iron core
Powdered iron core
Air core
Iron core

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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

Self-inductance
Mutual inductance
Series aiding inductance
Capacitance

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Electromagnetic induction
Current changing from 8 A to 12 A in one second induced 20 volts in a coil. The value of inductance is

15 H
10 H
20 H
5 H

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Electromagnetic induction
The core of a coil has a length of 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will

28 mH
12 mH
24 mH
3 mH

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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
300 N
100 N
1000 N

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