O-LevelPhysicsMagnetism5054/11 · May/June 2011 · Q361 Mark

The diagram shows part of an a.c. generator when its coil is in a horizontal position. The graph shows the voltage output plotted against time. Which point on the graph shows when the coil is in a vertical position?

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APoint A on the voltage output-time graph, showing maximum positive voltage.

BPoint B on the voltage output-time graph, showing zero voltage as voltage decreases.

CPoint C on the voltage output-time graph, showing maximum negative voltage.

DPoint D on the voltage output-time graph, showing zero voltage as voltage increases.

✓ Correct answer

B: Point B on the voltage output-time graph, showing zero voltage as voltage decreases.

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