A-LevelPhysicsSuperposition9702/12 · Oct/Nov 2015 · Q281 Mark

The diagram shows a tuning fork above a tube of air of length 25 cm. [Figure showing a tuning fork above a tube of air, length 25 cm, sealed at the bottom] A stationary wave is set up in the tube with the same frequency as the tuning fork. The lower end of the tube is sealed. This is the minimum length of tube with the lower end sealed that creates a stationary wave. Which other lengths of tubes, sealed at their lower end, will also create a stationary wave?

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A37.5 cm and 50 cm

B50 cm and 75 cm

C75 cm and 100 cm

D75 cm and 125 cm

✓ Correct answer

D: 75 cm and 125 cm

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2015 Paper 1 Variant 2, question 28.

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