Magnetism Question 180
Question: 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]
Options:
A) $ \frac{M}{2},\frac{m}{2} $
B) $ M,\frac{m}{2} $
C) $ \frac{M}{2},m $
D) $ M,m $
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Answer:
Correct Answer: C
Solution:
Pole strength of each part =m Magnetic moment of each part $ ={M}’={m}’{L}’=mL=\frac{M}{2} $
BETA
