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The figure illustrate how B, the flux density inside a sample of unmagnetised ferromagnetic material varies with B0, the magnetic flux density in which the sample is kept. For the sample to be suitable for making a permanent magnet :-

 

Option 1 -

OQ should be large, OR should be small

Option 2 -

OQ and OR should both be large

Option 3 -

OQ should be small and OR should be large

Option 4 -

OQ and OR should both be small

0 1 View | Posted 3 weeks ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    3 weeks ago
    Correct Option - 2


    Detailed Solution:

    For permanent magnet, both retentivity & coercivity should be high.

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