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Electromagnetic induction

Electromagnetic induction
A crack in the magnetic path of an inductor will result in

Zero inductance
Reduced inductance
Increased inductance
Unchanged inductance

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

1000 ohms
500 ohms
5000 ohms
100 ohms

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Electromagnetic induction
In case all the flux from the current in coil 1 links with coil 2, the coefficient of coupling will be

2.5
2.0
1.0
0.5

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Electromagnetic induction
The self-inductance of the coil may be defined as equal to the e.m.f. induced in volts when the current in the circuit changes at the rate of unit Weber turns.

No
Yes

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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

400 N
1000 N
300 N
100 N

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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

60 N
30 N
120 N
90 N

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MORE MCQ ON Electromagnetic induction

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