Magnetism Question 181
Question: Two identical thin bar magnets each of length l and pole strength m are placed at right angle to each other with north pole of one touching south pole of the other. Magnetic moment of the system is
[MNR 1981; MP PET 2002]
Options:
A) ml
B) 2ml
C) $ \sqrt{2}ml $
D) $ \frac{1}{2}ml $
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Answer:
Correct Answer: C
Solution:
$ M _{net}=\sqrt{2}M=\sqrt{2}ml. $