FIGURE 27-2
-A horizontal, long current-carrying wire is hanging from a vertical thread. The current is oriented into the plane of Fig. 27-2 shown above. A uniform magnetic field is applied and the wire is pulled away from the vertical. Which of the arrows labeled A to D correctly indicate the direction of the magnetic field?

Question

FIGURE 27-2 
-A horizontal, long current-carrying wire is hanging from a vertical thread. The current is oriented into the plane of Fig. 27-2 shown above. A uniform magnetic field is applied and the wire is pulled away from the vertical. Which of the arrows labeled A to D correctly indicate the direction of the magnetic field?

Quizplus · Accepted Answer

The wire experiences a magnetic force due to the current and the magnetic field, which causes it to be pulled away from the vertical. According to the right-hand rule, if the current is into the plane and the force is to the right (away from vertical), the magnetic field must be directed upwards, which corresponds to arrow C.

FIGURE 27-2 -A Horizontal, Long Current-Carrying Wire Is Hanging from a Vertical