A-LevelPhysicsWavesFeb/Mar 2024Paper 1 Q251 Mark

A sound wave is detected by a microphone and displayed on the screen of a cathode-ray oscilloscope (CRO). [Figure showing a waveform on a CRO screen, with 1 cm indicated for both vertical and horizontal axes] The frequency of the wave is 2.5 kHz. What is the setting on the time-base of the CRO?

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

The correct answer is A: 0.1 ms cm⁻¹.

Q: What topic does this question test?

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

A0.1 ms cm⁻¹

B0.4 ms cm⁻¹

C0.1 s cm⁻¹

D0.4 s cm⁻¹

✓ Correct Answer

The correct answer is A: 0.1 ms cm⁻¹

📋 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 Waves in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Feb/Mar 2024 examination, Paper 1 Variant 2.

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