A-LevelPhysicsSuperpositionFeb/Mar 2022Paper 1 Q251 Mark
A corridor is 13.2 m long and has closed doors that reflect sound at both ends. The speed of sound in the air in the corridor is 330 ms⁻¹. [Figure 25.1] What is the lowest frequency of sound that could create a stationary wave in the corridor with a node halfway along it?
A0.040 Hz
B13 Hz
C25 Hz
D50 Hz
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of superposition 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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