The intensity of magnetization of a bar magnet is 5.0 x 104 Am-1.

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111.

The intensity of magnetization of a bar magnet is 5.0 x 104 Am-1.The magnetic length and the area of cross section of the magnet are 12 cm and 1cm2 respectively. The magnitude of magnetic moment of this bar magnet is (in SI unit)

  • 0.6

  • 1.3

  • 1.24

  • 2.4


A.

0.6

We know that

Intensity of magnetisation

          I = MV

[where M = magnetic moment, V = volume]

So,      M = IV = 5.0 × 104 × 12100 × 11002

              = 60 × 104 × 10-6 

              = 0.6 Am2


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