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A permanent magnet in the shape of a thi...

A permanent magnet in the shape of a thin cylinder of length `10cm` has `M=10^6A//m`. Calculate the magnetisation current `I_M`. (Here M is the intensity of magnetisation).

A

`10^(5)A`

B

`10^(3)A`

C

`1A`

D

`2A`

Text Solution

Verified by Experts

The correct Answer is:
A
Given, `M` (intensity of magnetisation) `=1(length)=10 cm=10xx10^(-2)m=0.1m` and
`I_(m)=` magnetisation current
We know that `M=(I_(M))/(1)`
`rArr I_(M)=Mxx1`
`=10^(6)xx0.1=10^(5)A`
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