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A Cylindrical magnet has a length of 5...

A Cylindrical magnet has a length of 5cm and a diameter of 1 cm it has a uniform magnetisation of `5.30 xx10^(3) A/m^(3)` what is its magnetic dipole moment ?

A

4Am^(2)

B

8Am^(2)

C

2Am^(2)

D

1Am^(2)

Text Solution

Verified by Experts

The correct Answer is:
B
Intensity of magnetisation (I) =`("Magnetic moment"("M"))/("Volume" ("V"))` and the volume of the cylinder `=piR^(2) L`
`=(5.3xx10^(3))xx3.14xx(0.5xx10^(-2))^(2)xx(5xx10^(-2))`
`=2xx10^(-2)` J/T
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