Ignoring air resistance and the little friction from the plastic tube, the magnet was a freely-falling object in each trial. If a freely-falling object is travelling twice as fast after it has fallen 40 m than after falling 10 m, what do you predict the maximum emf would be if you drop the magnet through the same coil from a height of 40 cm? Explain your answer.

emf will also be 10 times less as compared to when it has fallen

Explanation:

We know, from faraday's law-

and

So, as the height increases the velocity with which it will cross the ring will also increase.

Given

Now, from

From equation a and b we see that velocity when dropped from is 10 times greater when height is 40 so, emf will also be 10 times less as compared to when it has fallen

b

explanation: