8. Are the magnitudes of the two peak voltages the same for 1 magnet drop; and w

Question

8. Are the magnitudes of the two peak voltages the same for 1 magnet drop; and why or why not?

a.) No. The two emf peaks are not the same because the magnet is moving faster due to gravity.

b.)No. The two magnitudes of voltage peaks are different because the sign changes. Their values are the same, but the sign changes.

c.)Yes. The two emf peaks are the same because the magnet's poles (North and South) have the same strength of field.

d.) Yes. Within the experimental uncertainties, the peak voltage were the same, because the net change in flux should be zero.

Thank you!

Explanation / Answer

I assume that the coil is wound around the middle of a tube and the magnet is dropped from the top so that it enters the coil with some speed, and then emerges with a somewhat greater speed.

I would expect the graph of voltage (V) vs time (t) to consist of 2 'peaks' of opposite polarity, the later 'peak' having somewhat greater amplitude, but shorter in time.

outgoing peak will be higher than the incoming peak because of the speed of the magnet will increase due to gravity when it will fall.

so Option (A) is correct.

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