A square loop of side a is placed at a distance a length away from a long wire carrying a current I 1 . If the loop carries a current I 2 as shown in the figure. Then the nature of the force and its amount is

Question

A square loop of side a is placed at a distance a length away from a long wire carrying a current I 1 . If the loop carries a current I 2 as shown in the figure. Then the nature of the force and its amount is, μ 0 I 1 I 2 2 π a , attractive, μ 0 I 1 I 2 4 π , attractive, μ 0 I 1 I 2 4 π , repulsive, μ 0 I 1 I 2 4 π a , repulsive

MARKS App · Accepted Answer

From the figure it is clear that F 2 & F 4 cancel each other, but F 1 > F 3 F n e t = F 1 - F 3 F n e t = μ 0 I 1 I 2 2 π a a - μ 0 I 1 I 2 4 π a a F n e t = μ 0 I 1 I 2 4 π

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