A steel wire of length 1 and magnetic moment 
is bent into a semicircular arc of radius 
. The new magnetic moment is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
When wire is bent in the form of semi-circular arc then,
So, 
Distance between two end points of semi-circular wire
So, magnetic moment of semi-circular wire
But, 
is magnetic moment of straight wire. i.e 
So, New magnetic moment 
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