When a thin bar magnet of magnetic moment ‘M’ is bent in the form of S – shape with the arms of equal length as shown in figure then new magnetic moment is
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a
M25
b
2M5
c
M5
d
M5
answer is C.
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Detailed Solution
Magnetic moment of each part =M5Net magnetic moment of the combination =M5-i^+M5-j^+M5+i^+M5-j^+M5-i^⇒M→net=-2M5j^-M5i^⇒M→net=2M52+M52=M5