Magnetism Question 172
Question: Two small bar magnets are placed in a line with like poles facing each other at a certain distance d apart. If the length of each magnet is negligible as compared to d, the force between them will be inversely proportional to
[CPMT 1971; NCERT 1971; MP PMT 1992]
Options:
A) $ d $
B) $ d^{2} $
C) $ \frac{1}{d^{2}} $
D) $ d^{4} $
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Answer:
Correct Answer: D
Solution:
$ F=\frac{{\mu _{0}}}{4\pi }( \frac{6M{M}’}{d^{4}} ) $ in end-on position.
BETA
