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Electromagnetic induction

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

90 N
30 N
60 N
120 N

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Electromagnetic induction
Two coils have self-inductances of 10 H and 2 H, the mutual inductance being zero. If the two coils are connected in series, the total inductance will be

12 H
9 H
10 H
6 H

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

Powdered iron core
Iron core
Laminated iron core
Air core

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Electromagnetic induction
The direction of induced e.m.f. can be found by

Kirchhoff s voltage law
Lenz's law
Laplace's law
Fleming's right hand rule

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Electromagnetic induction
An average voltage of 10 V is induced in a 250 turns solenoid as a result of a change in flux which occurs in 0.5 second. The total flux change is

2 wb
20 wb
0.2 wb
0.02 wb

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Electromagnetic induction
In case of an inductance, current is proportional to

Both of the listed here
None of the listed here
Magnetic field
Voltage across the inductance

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