A-LevelPhysicsSuperposition9702/12 · Feb/Mar 2020 · Q261 Mark

A musical instrument is made using a long tube with a mouthpiece at one end. The other end is open and flared, as shown. [Figure showing a tube with a mouthpiece at one end (closed end) and an open, flared end] 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 instrument can produce is 92 Hz. Which different frequencies of sound can be produced by the instrument?

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A92 Hz, 138 Hz, 184 Hz, 230 Hz

B92 Hz, 184 Hz, 276 Hz, 368 Hz

C92 Hz, 276 Hz, 460 Hz, 644 Hz

D92 Hz, 276 Hz, 828 Hz, 1288 Hz

✓ Correct answer

C: 92 Hz, 276 Hz, 460 Hz, 644 Hz

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2020 Paper 1 Variant 2, question 26.

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