A Long Straight Wire Has a Constant Current Flowing to the Right.A

question 16

Multiple Choice

A long straight wire has a constant current flowing to the right.A square ring is situated above the wire,and also has a constant current flowing through it (as shown) .Which of the following statements is true?

• A)The net magnetic force on the ring is upward,and there is also a net torque on the ring.
• B)The net magnetic force on the ring is zero,and the net torque is zero.
• C)The net magnetic force on the ring is downward,and there is also a net torque on the ring.
• D)The net magnetic force on the ring is zero,but there is a net torque on the ring.
• E)The net magnetic force on the ring is downward,and the net torque is zero.

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