1.

A long magnetic needle of length 2L, magnetic moment M and pole strength m units is broken into two pieces at the middle. The magnetic moment and pole strength of each piece will be                  [NCERT 1983; DPMT 1987]

A.            \[\frac{M}{2},\frac{m}{2}\]   
B.            \[M,\frac{m}{2}\]
C.            \[\frac{M}{2},m\]              
D.            \[M,m\]
Answer» D.            \[M,m\]


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