13. In the sketch (not to scale) a long straight wire carries a vertical current

Question

13. In the sketch (not to scale) a long straight wire carries a vertical current I1- 2A in the plane of the page. A square frame whose sides a = 0.5 cm is also in the plane of the page and to the right of the straight wire. It carries a counterclockwise current of I2 16A and is oriented parallel to the wire. Which of the following correctly describes the net force on the frame A) the frame is repelled by the wire B) the frame is attracted to the wire C) the net force on the frame is zero, but there is a torque which attempts to turn it around a vertical axis D) the net force on the frame is zero, but there is a torque which attempts to turn it around a horizontal axis E) both the net force and torque are zero

Explanation / Answer

There will be no torque between wire and loop since they both are in same plane

B will become larger when it is near the wire

so the answer will be

frame is attracted to the wire

option B

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