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. $