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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

A long horizontally fixed wire carries a current of 100 A. Directly above and parallel to it is a fine wire that carries a current of 20 A and weights . The distance between the two wires for which the upper wire is just supported by magnetic repulsion is

Answer: (C)

Solution

Balance per unit length: $=0.04⇒

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Question ID VK-078836