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A bar magnet having magnetic moment $M$ is bent as an arc. Its magnetic moment
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The correct answer is:
decreases
Magnetic moment of a bar magnet,
$\mathbf{M}=m(2 \mathbf{l})$
$=$ pole strength $\times$ distance between poles
When bar magnet is bent as an arc distance between poles decreases whereas pole strength remains same.
So, its magnetic moment also, decreases.
$\mathbf{M}=m(2 \mathbf{l})$
$=$ pole strength $\times$ distance between poles
When bar magnet is bent as an arc distance between poles decreases whereas pole strength remains same.
So, its magnetic moment also, decreases.
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