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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The magnetism left in the iron after exciting field has been removed is known as

reluctance
permeance
residual magnetism
susceptance

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Magnetism and Electromagnetism
Indicate which of the following material does not retain magnetism permanently.

Hardened steel
None of the listed here
Stainless steel
Soft iron

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Magnetism and Electromagnetism
The unit for permeability is

At/m
Wb/At × m
Wb
At/Wb

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

240 AT
2.4 AT
0.24 AT
24 AT

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

240 At
2,400 At
24 At
2.4 At

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Magnetism and Electromagnetism
The induced voltage across a stationary conductor in a stationary magnetic field is

reversed in polarity
zero
decreased
increased

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MORE MCQ ON Magnetism and Electromagnetism

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