Question

A permanent magnet in the shape of a thin cylinder of length $10$cm has magnetisation (M) $={10}^6$A $m^{-1}$. It's magnetization current $I_M$ is?

• A. ${10}^5$A
• B. ${10}^6$A
• C. ${10}^7$A
• D. ${10}^8$A

Answer 1

The correct option is A ${10}^5$A

Given:

The length of the thin cylinder is $10cm$.

The magnetization of the magnet is ${10}^{6}A/m$

The magnetization current is given by:

$I_M=M\times l$

$I_M={10}^6\times 0.1$

$\Rightarrow {10}^{5}A$