O-LevelPhysicsMagnetism5054/12 · May/June 2015 · Q361 Mark

A teacher moves a magnet into and out of a coil of wire, as shown, in order to demonstrate electromagnetic induction. Which statement is correct?

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AAs the magnet is moved into the coil the left-hand end of the coil becomes a S-pole.

BAs the magnet is taken out of the coil the left-hand end of the coil becomes a N-pole.

CIncreasing the speed at which the magnet enters the coil, increases the induced voltage.

DIncreasing the speed at which the magnet leaves the coil decreases the induced voltage.

✓ Correct answer

C: Increasing the speed at which the magnet enters the coil, increases the induced voltage.

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