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  4. A square current loop (side = a, current = i2) is placed at a distance 'a' from straight wire in which current i1 is flowing through it. Net magnetic force on square loop is

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Q. A square current loop (side = a, current = i$_2$) is placed at a distance 'a' from straight wire in which current i$_1$ is flowing through it. Net magnetic force on square loop isPhysics Question Image

Solution:

Correct answer is (b) $\frac{\mu_0 i_1 i_2}{4 \pi},$Repulsive