13. (9 pts) A long straight wire carries a constant current l, in the z-directio

Question

13. (9 pts) A long straight wire carries a constant current l, in the z-direction. A nearby loop in the x-z plan carries a constant current 12 in the clockwise direction as shown. Bi is the magnetic flux density due to the straight wire. a) The direction of Bi at the location of the loop is: (i) i (ii)-i (iii) , (iv)(v) b) The net force on the loop is not zero because: 12 Z (vi) " 0 the force is stronger on the sides of the loop perpendicular to the wire (Gi) the net force on the loop is zero, though the torque is not zero (ii) the force is stronger on the side of the loop closer to the wire üv) the foree is stronger on the side of he loop farthest away from the wire c) The direction of the net force on the loop is: 0) i (ii) "k (iii) , (iv)-9 d) Is there a net torque on the loop? Yes or No (v) ENTER If no, explain why not. If yes, calculate the torque

Explanation / Answer

1. Direction Of B1 at the location of the loop is (-y) direction.

2. Net force on the loop is not zero because force is stronger on the side of the loop closer to the wire.

3. Direction of net force on the loop is (-x) direction.

4. Net torque on the loop is zero, as torque is present when there is coupling force present. But, this configuration there is no coupling force present. Hence, no torque.

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