Q.

Two straight parallel conductors are kept horizontally one above the other. If the upper wire suspends in air without any support, then the direction of flow of current in the wires should be

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a

In the same or opposite directions

b

In opposite direction

c

The wires should be perpendicular

d

In same direction

answer is B.

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Detailed Solution

The weight of the conductor is equal to force of repulsion. Hence the direction of flow of current in the wires should be in opposite direction.

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