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

question 20

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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