A) \[M\]
B) \[2M\]
C) \[\frac{M}{2}\]
D) zero
Correct Answer: C
Solution :
Let effective length and pole strength of a bar magnet is \[2l\] and \[m,\]then Magnetic moment \[M=m\times 2l\] ?(i) If the magnetic moment of either part be M, then \[M=ml\] ?(ii) Dividing Eq. (ii) by Eq. (i), we have \[\frac{M}{M}=\frac{ml}{2ml}=\frac{1}{2}\] \[\therefore \] \[M=\frac{M}{2}\]You need to login to perform this action.
You will be redirected in
3 sec