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Magnetism and Electromagnetism

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

24 At
240 At
2.4 At
2,400 At

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Magnetism and Electromagnetism
The stray line of magnetic flux is defined as

A line of magnetic flux which does not follow the designed path
The mean length of a ring shaped coil
A line vertical to the flux lines
A line of magnetic flux in a non-uniform field

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Magnetism and Electromagnetism
Which of the following materials are diamagnetic?

Copper
Silver
Silver and copper
Iron

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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?

100 At
300 At
200 At
150 At

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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
Which of the following type of materials are not very important for engineering applications?

None of the listed here
Diamagnetic material
Paramagnetic material
Ferro magnetic material

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MORE MCQ ON Magnetism and Electromagnetism

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