FIGURE 29-3
-Fig. 29-3 above shows a bar magnet moving upward along the vertical axis toward a horizontal coil. The poles of the bar magnets are labeled X and Y. As the bar magnet approaches the coil it induces an electric current in the direction indicated on the figure. What are the correct polarities of the magnet?

Question

FIGURE 29-3 
-Fig. 29-3 above shows a bar magnet moving upward along the vertical axis toward a horizontal coil. The poles of the bar magnets are labeled X and Y. As the bar magnet approaches the coil it induces an electric current in the direction indicated on the figure. What are the correct polarities of the magnet?

Quizplus · Accepted Answer

The correct answer is A because the induced current in the coil is in the clockwise direction, which means that the magnetic field produced by the coil is in the upward direction. This means that the pole of the magnet that is closest to the coil must be a south pole, and the pole of the magnet that is farthest from the coil must be a north pole.

FIGURE 29-3 -Fig. 29-3 Above Shows a Bar Magnet Moving Upward Along