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Magnetism and Electromagnetism

Magnetism and Electromagnetism
What is the mmf of a wire with 8 turns carrying three amperes of current?

24 AT
0.24 AT
2.4 AT
240 AT

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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?

300 AT
0.3 AT
3 AT
30 AT

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Magnetism and Electromagnetism
When the speed at which a conductor is moved through a magnetic field is increased, the induced voltage

decreases
reaches zero
remains constant
increases

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

zero
lower
higher
little

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Magnetism and Electromagnetism
The commonly used material for shielding or screening magnetism is

Copper
Brass
Soft iron
Aluminium

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Magnetism and Electromagnetism
Reciprocal of permeability is

Reluctivity
conductance
Susceptibility
Permeability

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MORE MCQ ON Magnetism and Electromagnetism

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