A-LevelPhysicsSuperpositionFeb/Mar 2016Paper 1 Q251 Mark
A musical instrument called a bugle is a long tube with a mouthpiece at one end. The other end is open and flared, as shown. [Figure 25.1] A musician maintains stationary sound waves with a node at the mouthpiece and an antinode at the other end. The lowest frequency of sound that the bugle can produce is 92 Hz. Which different frequencies of sound can be produced by the bugle?
A92 Hz, 138 Hz, 184 Hz, 230 Hz, 276 Hz
B92 Hz, 184 Hz, 276 Hz, 368 Hz, 460 Hz
C92 Hz, 276 Hz, 460 Hz, 644 Hz, 828 Hz
D92 Hz, 276 Hz, 828 Hz, 2484 Hz, 7452 Hz
✓ Correct Answer
The correct answer is C: 92 Hz, 276 Hz, 460 Hz, 644 Hz, 828 Hz
📋 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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