Strengths of two magnetic poles are 0.5 ...

Strengths of two magnetic poles are 0.5 A m 2 A.m If they are a distance of 5 cm from each other in air, what will be the mutual force acting between them ? For what separation dose that force become `10^(-5)N` ?

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The correct Answer is:

`4xx10^(-5)N,10cm`

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