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Electromagnetic induction

Electromagnetic induction
Lenz's law is a consequence of the law of conservation of

Charge
Induced e.m.f.
Induced current
Energy

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Electromagnetic induction
A coil with negligible resistance has 50V across it with 10 mA. The inductive reactance is

5000 ohms
500 ohms
1000 ohms
100 ohms

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

Laminated iron core
Air core
Iron core
Powdered iron core

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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

1000 N
400 N
300 N
100 N

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

Variable resistor
Condenser
Resistance
Inductance

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Electromagnetic induction
As per Faraday's laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it

Lies perpendicular to the magnetic flux
Lies in a magnetic field
Moves parallel to the direction of the magnetic field
Cuts magnetic flux

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