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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Air gap has_______eluctance as compared to iron or steel path

higher
lower
little
zero

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Magnetism and Electromagnetism
The induced voltage across a coil with 250 turns that is located in a magnetic field that is changing at a rate of 8 Wb/s is

3,125 V
31.25 V
2,000 V
1,000 V

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Magnetism and Electromagnetism
The use of permanent magnets is. not made in

Loud speakers
Energy meters
None of the listed here
Transformers

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Magnetism and Electromagnetism
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

150 At
300 At
100 At
200 At

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Magnetism and Electromagnetism
Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials.

triangular
None of the listed here
circular
rectangular

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Magnetism and Electromagnetism
The unit of flux is the same as that of

Reluctance
Pole strength
Permanance
Resistance

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MORE MCQ ON Magnetism and Electromagnetism

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