A magnetic wire of dipole moment is bent in the form of a semi-circle. What is the new magnetic moment is?
Step 1: Given Data
The dipole moment of wire is .
r is the radius of the semicircle.
Step 2: Formula Used
Step 3: Solution
Now as the wire is in semicircle, the new distance between the poles is
And, the new dipole moment is .
Substitute the values of M and L in the equation :
Substitute the values of m and L' in M'.
Hence, the dipole moment is .