A-LevelPhysicsWavesOct/Nov 2021Paper 1 Q251 Mark
A train travels in a straight line at a constant speed of 30 m s⁻¹. The train's horn continuously emits sound of frequency 2400 Hz. A stationary observer stands next to the train track. The train approaches the stationary observer, passes him and then moves away. The speed of sound is 340 m s⁻¹. What is the maximum difference in the frequencies of the sound heard by the stationary observer?
A190 Hz
B230 Hz
C430 Hz
D460 Hz
✓ 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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