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Uses of Eddy Current

Two short mag...

Question

Two short magnets each of moment $10 A - m^{2}$ are placed in end - on position so that their centres are $0.1 m$ apart. The force between them is

A

0.4 N

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B

0.5 N

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C

0.6 N

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D

0.8 N

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Solution

The correct option is C $0.6 N$
Use the formula for force between two magnetic dipoles:
$F = \frac{μ}{4 π} \frac{6 M_{1} M_{2}}{d^{4}}$
$F = 0.6 N$

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