Magnetic moment of a magnet after it is cut or bent

1. A.
   $\frac{1}{2\sqrt{2}}$
2. B.
   1
3. C.
   $\sqrt{2}$
4. D.
   $\frac{1}{\sqrt{2}}$

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1. A.
   $\frac{M}{L}$
2. B.
   $\frac{M}{\pi}$
3. C.
   $\frac{M}{2\pi}$
4. D.
   $\frac{2M}{\pi}$

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