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Electromagnetic induction

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

Resistance
Inductance
Condenser
Variable resistor

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

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

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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

10 H
20 H
5 H
15 H

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Electromagnetic induction
Which of the following is not a unit of inductance?

Hennry
Volt second per ampere
All of the listed here
Coulomb/volt ampere

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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

100 N
300 N
1000 N
400 N

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Electromagnetic induction
The magnitude of the induced e.m.f. in a conductor depends on the

Amount of flux linkages
Flux density of the magnetic field
Rate of change of flux-linkages
Amount of flux cut

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