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Two small bar marnets are placed in a li...

Two small bar marnets are placed in a line with like poles facing each other at a certain distance d apart. If the length of each magnet is neglifible as compared to d, the force between them will be inversely proportional to

A

`d ^(2)`

B

`d `

C

`d ^(3)`

D

`d ^(4)`

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The correct Answer is:
D
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