This is a sample collection; additional problems of this sort will be needed for students to comprehend the concepts involved.
General Comments on Effectiveness: As usual, these physlet-enhanced problems are an improvement over traditional end-of-chapter textbook problems. Problem 9.7.a2 should be remarkably effective in promoting conceptual understanding of Lenz's Law.
Some of these problems are effective as is; for others the effectiveness could be much improved by asking different or additional questions. The lack of user control over any parameter limits exploration of Faraday's law. The following comments are arranged by specific problem:
- 9.7.1 - The lack of a visual clue about the magnet's motion is disconcerting.
- 9.7.2 - This problem would be pedagogically more effective if there were a series of several questions guiding students to the most general form (e.g., Does the field on either side change in time? How does the z-component for x>0 compare to that for x <0?) They are unlikely to get the complete solution, otherwise.
- 9.7.3 - The graph with the evolving time scale is confusing, and distracts from a complete understanding of the change in magnetic flux. Otherwise, a very effective problem.
- 9.7.ap2 - This is not really a Faraday's law problem. However, the applet could be used to create an interesting, though difficult, Faraday's law problem or lecture/demonstration since the induced voltage in a loop is shown as the loop is dragged around in the vicinity of the straight current-carrying wire.