A thin circular wire carrying a current I has a magnetic moment M. The shape of the wire is changed to a square and it carries the same current. It will have a magnetic moment
A
M
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Initially for circular coil 
and 
..... (i)
Finally for square coil 
..... (ii)
Solving equation (i) and (ii) 
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