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The illustrates how B the flux density i...

The illustrates how B the flux density inside a sample of unmagnetised ferromagnetic material varies is kept for the sample to be suitable for making a permanent magnet

A

OQ should be large OR should be small

B

OQ and OR should be large

C

OQ should be small and OR should be large

D

OQ and OR should both be small

Text Solution

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The correct Answer is:
B
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State, briefly, an efficient way of making a permanent magnet. Write two properties to select suitable materials for making permanent magnets.

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