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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

residual magnetism
reluctance
permeance
susceptance

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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
circular
None of the listed here
rectangular

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

Aluminium
Brass
Soft iron
Copper

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Magnetism and Electromagnetism
Magnetism of a magnet can be destroyed by

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

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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 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

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

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MORE MCQ ON Magnetism and Electromagnetism

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