O-LevelPhysicsElectricityOct/Nov 2023Paper 1 Q381 Mark

The diagram shows the trace produced on the screen of an oscilloscope due to an alternating voltage input. The time-base on the oscilloscope is set to 4 ms/cm. What does the trace look like when the time base is set to 2 ms/cm?

Q: What topic does this question test?

This question tests Electricity in O-Level Physics (syllabus code 5054). It is worth 1 mark.

AOscilloscope trace A (showing 3 full cycles within the same width as the original)

BOscilloscope trace B (showing 1.5 full cycles within the same width as the original)

COscilloscope trace C (showing 4 full cycles within the same width as the original)

DOscilloscope trace D (showing 2 full cycles within the same width as the original)

✓ Correct Answer

The correct answer is C: Oscilloscope trace C (showing 4 full cycles within the same width as the original)

📋 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 O-Level Physics Question

Topic

This multiple-choice question tests Electricity in O-Level Physics (syllabus code 5054). It is worth 1 mark.

Source

This question appeared in the Cambridge O-Level Physics Oct/Nov 2023 examination, Paper 1 Variant 2.

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