A-LevelPhysicsSuperposition9702/12 · Oct/Nov 2018 · Q271 Mark

Progressive sound waves of wavelength 20 cm enter the air columns in a closed pipe P and an open pipe Q. The lengths of the pipes are shown. [Figure 27.1] In which pipe or pipes are stationary waves formed?

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AP and Q

BP only

CQ only

Dneither P nor Q

✓ Correct answer

A: P and Q

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2018 Paper 1 Variant 2, question 27.

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