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A steel wire of length $l$ has a magnetic moment M. It is bent into L shape from the middle. The new magnetic moment is |
$M$ $M/\sqrt{2}$ $M/2$ $2M$ |
$M/\sqrt{2}$ |
Magnetic moment M = mL if we bent it from middle then effective length i.e length between its end become $\frac{L}{\sqrt2}$ new Magnetic moment = m$\frac{L}{\sqrt2}$ = $\frac{M}{\sqrt2}$ |
