O-LevelPhysicsMagnetism5054/11 · Oct/Nov 2010 · Q341 Mark

The diagram shows an a.c. generator connected to an electrical circuit (load resistor). Which statement is correct?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

AThe direction of the potential difference across the load resistor is always the same.

BThe size of the induced e.m.f. depends on the number of turns in the coil.

CThe size of the induced e.m.f. does not change as the coil turns.

DWinding the coil on a soft-iron cylinder makes no difference to the induced e.m.f.

✓ Correct answer

B: The size of the induced e.m.f. depends on the number of turns in the coil.

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