Magnetism Question 216
Question: The effective length of a magnet is 31.4 cm and its pole strength is 0.5 Am. The magnetic moment, if it is bent in the form of a semicircle will be
[DPMT 2003]
Options:
A) $ 0.1,,Am^{2} $
B) $ 0.01,,Am^{2} $
C) $ 0.2,,Am^{2} $
D) $ 1.2,,Am^{2} $
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Answer:
Correct Answer: A
Solution:
Similar to solution (1) New magnetic moment $ M’=\frac{2M}{\pi }=\frac{2mL}{\pi }=\frac{2\times 0.5\times 31.4\times {{10}^{-2}}}{3.14}=0.1,amp\times m^{2} $
BETA
