A-LevelPhysicsAlternating currentsOct/Nov 2009Paper 1 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?

Q: What is the correct answer to this A-Level Physics question?

The correct answer is A: period/ms: 20, peak voltage/V: 4.

Q: What topic does this question test?

This question tests Alternating currents in A-Level Physics (syllabus code 9702). It is worth 1 mark.

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

The correct answer is A: period/ms: 20, peak voltage/V: 4

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Physics Question

Topic

This multiple-choice question tests Alternating currents in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2009 examination, Paper 1 Variant 2.

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