A-LevelPhysicsWavesFeb/Mar 2022Paper 1 Q201 Mark
Which statement about progressive waves is correct?
AThey are always transverse waves.
BThey can exist in solids but not liquids.
CThey decrease in frequency as their speed increases.
DThey transfer energy away from their source.
✓ Correct Answer
The correct answer is D: They transfer energy away from their source.
📋 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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