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

question 39

Multiple Choice

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

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

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