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The figure illustrate how B, the flux de...

The figure illustrate how B, the flux density inside a sample of unmagnetised ferromagnetic material varies with `B_(0)`, the magnetic flux density in which the sample is kept. For the samle to be suitable for making a permanent magnet

A

OQ should be large, OR should be small

B

OQ and OR should both be large

C

OQ should be small and OR should be large

D

OQ and OR should both be small

Text Solution

Verified by Experts

The correct Answer is:
B
In the given figure OQ refers to retentivity while OR refers to coercivity. For permanents both retentivity and coercivity should be high.
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