Questions
If a bar magnet of magnetic moment 80 units be cut perpendicular to axis into two halves of equal lengths, the magnetic moment of each half will be
a
80 units
b
40 units
c
160 units
d
20 units
detailed solution
Correct option is B
Let pole strength =m∴M=m×l when l'=l2then M'=m×l'=ml2=M2=40 unitTalk to our academic expert!
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