Magnetism Question 205
Question: Two similar bar magnets P and Q, each of magnetic moment M, are taken, If P is cut along its axial line and Q is cut along its equatorial line, all the four pieces obtained have
[EAMCET (Engg.) 2000]
Options:
A) Equal pole strength
B) Magnetic moment $ \frac{M}{4} $
C) Magnetic moment $ \frac{M}{2} $
D) Magnetic moment M
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Answer:
Correct Answer: C
Solution:
If pole strength, magnetic moment and length of each part are $ {m}’,{M}’ $ and $ {L}’ $ respectively then $ {m}’=\frac{m}{2} $
$ {m}’=m $
$ {L}’=L $
$ {L}’=\frac{L}{2} $
$ \Rightarrow {M}’=\frac{M}{2} $
$ \Rightarrow {M}’=\frac{M}{2} $
BETA
