A bar magnet of moment 'M' is bent into
a shape 5. If the length of the each part
is same, its new magnetic moment will
be
53
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Assume the poles of pole strength m to be at the opposite ends of the magnet.
Dipole moment M=m.l
When the magnet is bent into semicircle, the new distance between the poles l
new
=2R where πR=l
∴l
new
=
π
2l
M
new
=m.l
new
=m.
π
2l
=
π
2M
December 20, 2019
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