question_answer

In the given figure, the loop is fixed but straight wire can move. The straight wire will:

A)  remain stationary

B)  move towards the loop

C)  move away from the loop

D)  rotates about the axis

Correct Answer: B

Solution :

 If we consider a small element\[dL\](shown in figure) the magnetic force on the considered element is towards the straight wire. Hence, [b] is correct.