Part B: Changing Other Properties of the Generator
Predicting Record your prediction of how reversing the direction of the magnet will affect the current.
To test your prediction, reconnect the wire to the multimeter exactly as you did before. Repeat Step 4, but this time, hold the magnet by its north pole.
Predicting Record your prediction of how reversing the direction of the turns in the coil will affect the current if you hold the magnet by its south pole.
To test your prediction, remove the wire from the tube. Now wrap 30 turns of wire in the opposite direction—counterclockwise.
Repeat Step 4, holding the magnet by its south pole.
Construct a graph using the data from the first three rows of your data table. Plot the number of turns on the horizontal axis and the current on the vertical axis.
Analyze and Conclude
Inferring What caused a current in the wire?
Using Graphs Based on your graph, what is the relationship between the number of turns and the amount of current?
Analyzing Data Explain the effect that reversing the direction of the magnet or the direction of the turns had on the direction of the current.
Predicting Explain whether a generator could be built with a stationary magnet and a coil that moved.
Evaluating and Revising Did your observations support your predictions? If not, evaluate any flaws in the reasoning you used to make the predictions.
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