Check your prediction by making and testing a coil with 8 loops. Make sure you drop the same stack of magnets from the same 25-cm height, and average 4 drops for comparison. What is the purpose of dropping the stack of magnets?
1) To measure the strength of the magnetic field
2) To determine the number of loops in the coil
3) To test the durability of the coil
4) To compare the effects of different heights on the magnets