Force between two magnetic poles is 50×10^-7N. Find the force when the distance between them is doubled.
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The force between two magnetic poles is directly proportional to the product of their strengths and is inversely proportional to the square of the distance between them.
The formula is in the attachment.
It is from the best study app so it is correct.
By this formula, if you try to do it yourself you find it easy.
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