Chapter 7.2, Problem 1bT

B. Make prediction for the following five situations based on what you observed in part A.
Check your answers only after you have made all five predictions.

1. The magnet is turned so that the south pole is near the wire while the battery is connected.

Prediction:
Observation:

2. The leads to the battery are reversed (consider both orientations of the magnet).

Prediction:
Observation:

3. The north pole of the magnet is held near the wire but the battery is not connected.

Prediction:
Observation:

4. The north pole of the magnet is held: (a) closer to the wire and (b) farther from the wire.

Prediction:
Observation:

5. The magnet is turned so that it is parallel to the wire while the batter)’ is connected.

Prediction:
Observation:

Resolve any discrepancies between your predictions and your observations. (Hint: Consider the vector equation for the magnetic force on a current-carrying wire in a magnetic field: $\stackrel{\to }{F}=i\stackrel{\to }{L}\times \stackrel{\to }{B}$ )