A-LevelPhysicsWavesOct/Nov 2024Paper 1 Q261 Mark
A source of sound emits waves of a constant frequency. The source moves at a constant speed in a straight line relative to a stationary observer. Which velocity of the source gives the smallest observed frequency?
Aspeed/ms⁻¹: 5, direction: away from observer
Bspeed/ms⁻¹: 10, direction: away from observer
Cspeed/ms⁻¹: 15, direction: towards observer
Dspeed/ms⁻¹: 20, direction: towards observer
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of waves within the Physicssyllabus. The examiner's mark scheme requires...
📋 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...
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