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Hysteresis

Permanent mag...

Question

Permanent magnet has properties retentivity and coercivity respectively as:

A

high-high

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B

low-low

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C

low-high

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D

high-low

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Solution

The correct option is A high-high
The material for a permanent magnet should have high retentivity (so that magnet is strong) and high coercivity (so that magnetism is not wiped out by strong magnetic fields).

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Q. The desirable properties for making permanent magnets are
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Q. Electromagnets are made of soft iron because soft iron has
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