The figure below shows an end view of a long current carrying wire with a separa

Question

The figure below shows an end view of a long current carrying wire with a separate loop of current carrying wire near the long wire. If the loop was held at rest then released from the orientation shown, which statement below correctly describes the initial motion of the loop of wire (assume the long wire is completely stationary)? A. The loop begins moving down and left as well as rotating clockwise. B. The loop's center does not move, but the loop begins rotating counterclockwise. C. The loop center does not move, and neither does the loop begin rotating. D. The loop begins moving down and left but does not rotate. E. The loop's center does not move, but the loop begins rotating clockwise. F. The loop begins moving up and right as well as rotating clockwise. G. The begins moving up and right as well as rotating counterclockwise. H. The loop begins moving up and right but does not rotate. I. The loop begins moving down and left as well as rotating counterclockwise.

Explanation / Answer

correct option is A as when released, loop will start moving down due to gravity. but as is moves down its distance from current carrying wire increases due to which magnetic flux into the loop as downward as seen from upside decreases, from lenzs law there will be induced emf and induced current in clockwise direction as seen from above side. due to magnetic filed there will be torque on the loop hence it will rotate.

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