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5.Magnetism and Matter
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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
A
$d$
B
${d^2}$
C
$\frac{1}{{{d^2}}}$
D
${d^4}$
Solution
(d)$F = \frac{{{\mu _0}}}{{4\pi }}\left( {\frac{{6MM'}}{{{d^4}}}} \right)$in end-on position.
Standard 12
Physics
