a current I is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and in the plane of the loop. If a steady current I is established in the wire, what will happen to the loop?

loop will move towards right

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loop will be attracted towards the wire

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will be unaffected by the wire

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none of these

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Solution

The correct option is B
loop will be attracted towards the wire

The resultant of the forces on AD and BC is zero. While the force on AB is attractive, the force on CD is repulsive. Since AB is nearer than CD, therefore the net force is attractive in nature. So, the loop will be attracted towards the wire.

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