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Electromagnetic induction

Electromagnetic induction
Reversing the field or the current will reverse the force on the conductor.

No
Yes

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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

9 H
10 H
12 H
6 H

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Electromagnetic induction
Which of the following is unit of inductance?

Ohm
Ampere turns
Hennry
Weber/metre

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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
1000 N
400 N
300 N

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

1000 ohms
5000 ohms
100 ohms
500 ohms

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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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