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

Options

A. `10^(5)A`
B. `10^(3)A`
C. 1A
D. 2A

Answer

A

Explanation

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