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If a bar magnet of pole strength 'm' and...

If a bar magnet of pole strength `'m'` and magnetic moment `'M'` is cut equally `4` times parallel to its axis and `5` times perpendicular to its axis then the pole strength and magnetic moment of each piece are respectively

A

`(m)/(20),(M)/(20)`

B

`(m)/(4),(M)/(20)`

C

`(m)/(5),(M)/(20)`

D

`(m)/(5),(M)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
C
`m^(1)=(m)/(5),M^(1)=(M)/(5xx4)`
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Knowledge Check

  • When a bar magnet of pole strength 'm' and magnetic moment 'M' is cut into n equal parts longitudinaly and transversely then pole strength and magnetic moment of each piece is respectively

    A
    `m//n, M//n`
    B
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    `4cm,62.5milli Am,250 milli amp. Cm^(2)`
    B
    `8 cm,500 milli Am,400 milli amp. Cm^(2)`
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    `16 cm,250 milli Am,4000milli amp.cm^(2)`
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