A-LevelPhysicsWavesOct/Nov 2019Paper 1 Q231 Mark
A loudspeaker emitting a constant frequency of 2000 Hz is swung in a horizontal circle with a speed of 15.0 m s⁻¹. A stationary observer is level with the loudspeaker and situated a long distance from the loudspeaker. The observer hears a sound of varying frequency. The maximum frequency heard is 2097 Hz. What is the speed of the sound in the air?
A294 m s⁻¹
B309 m s⁻¹
C324 m s⁻¹
D330 m s⁻¹
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of waves within the Physicssyllabus. The examiner's mark scheme requires...
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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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