A-LevelPhysicsAlternating currents9702/12 · Oct/Nov 2009 · Q31 Mark

The diagram shows an oscilloscope screen displaying two signals. [Figure 3.1] Signal X has a frequency of 50 Hz and peak voltage of 12 V. What is the period and peak voltage of signal Y?

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Aperiod/ms: 20, peak voltage/V: 4

Bperiod/ms: 20, peak voltage/V: 12

Cperiod/ms: 50, peak voltage/V: 4

Dperiod/ms: 50, peak voltage/V: 12

✓ Correct answer

A: period/ms: 20, peak voltage/V: 4

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Topic: Alternating currents, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2009 Paper 1 Variant 2, question 3.

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