A bar magnet of moment M and pole strength m is cut into parts of equal lengths. The magnetic moment and pole strength of either part is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
The bar magnet is shown in the diagram.
For Figs. and ,
Magnetic moment for Fig. , 
Magnetic moment for Fig. , 
Now, 
… (i)
When magnet is cut as shown in the diagram, pole strength will not be affected. Hence, 
[from Eq. (i)]
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