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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The materials having low retentivity are suitable for making

Temporary Magnet
Weak magnet
None of the listed here
Permanent magnet

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Magnetism and Electromagnetism
The direction of magnetic lines of force is

From one end of the magnet to another
From north pole to south pole
From south pole to north pole
None of the listed here

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Magnetism and Electromagnetism
A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will

Remain Constant
Increase
Be excessive
Decrease

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Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

Hammering
Heating
All of the listed here
By inductive action of another magnet

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

24 AT
2.4 AT
240 AT
0.24 AT

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

Stainless steel
Hardened steel
Soft iron
None of the listed here

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MORE MCQ ON Magnetism and Electromagnetism

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