A-LevelPhysicsSuperposition9702/12 · Feb/Mar 2019 · Q271 Mark

P and Q are fixed points at the end of a string. A transverse stationary wave of constant maximum amplitude is formed on the string. [Figure 27.1] P, R and Q are the only points on the string where nodes are formed. S and T are two points on the string at a distance x from R. What is the relationship between points S and T?

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Athe same amplitude and in phase

Bdifferent amplitudes and in phase

Cthe same amplitude and a phase difference of 180°

Ddifferent amplitudes and a phase difference of 180°

✓ Correct answer

C: the same amplitude and a phase difference of 180°

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2019 Paper 1 Variant 2, question 27.

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