For tho situation shown in the figure, indicate whether there will be a tendency

Question

For tho situation shown in the figure, indicate whether there will be a tendency for the square current loop to rotate clockwise. counterclockwise, or not at all, when viewed from above the loop along the indicated axis. The loop tends to rotate clockwise, as viewed from above. The loop tends to rotate counterclockwise, as viewed from above. The loop will not rotate at all. For the situation shown in the figure, indicate whether there wil be a tendency for the square current loop to rotate clockwise, counterclockwise, or not at all. when viewed from above the loop along the indicated axis.

Explanation / Answer

Since the direction of torque is given by the direction of m X B. And the direction of m is the direction of the thumb of the right hand when we curl the hand in the direction of current.

A)Direction of m is into the plane. So the direction of m X B will rotate the loop in counterclockwise direction when seen from the top. hence option (b) is correct.

B)Direction of m is into the plane. So the direction of m X B will rotate the loop in clockwise direction when seen from the top. Hence option (a) is correct.

C)Direction of m is into the plane. So the direction of m X B will be zero. Hence not torque will be experienced by the loop. Hence option (c) is correct.

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