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Electromagnetic induction

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

10 V
15 V
25 V
12 V

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

Powdered iron core
Iron core
Air core
Laminated iron core

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

Condenser
Inductance
Variable resistor
Resistance

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Electromagnetic induction
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will

Increases
Decreases
None of the listed here
Remains same

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Electromagnetic induction
Which circuit element(s) will oppose the change in circuit current?

Inductance and capacitance
Resistance only
Capacitance only
Inductance only

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

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