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Electricity and Magnetism — quick quiz

4 REET-pattern questions on Electricity and Magnetism. Instant scoring and solutions, no signup — see where you stand in a few minutes.

Question 1 of 4

Hard

A coil of insulated copper wire is connected to a galvanometer. A bar magnet is quickly pushed into the coil from one end. The galvanometer shows a deflection. When the magnet is held stationary inside the coil, the galvanometer shows no deflection. When the magnet is quickly pulled out, the galvanometer again shows a deflection in the opposite direction. This experiment demonstrates which of the following principles?