A-LevelPhysicsSuperposition9702/12 · May/June 2018 · Q241 Mark

A string is fixed at one end and the other end is attached to a vibrator. The frequency of the vibrator is slowly increased from zero. A series of stationary waves is formed. Assume that for a stationary wave there is a node at point P. [Diagram] What are the first five wavelengths of the stationary waves that could be formed?

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A2L/1, 2L/2, 2L/3, 2L/4, 2L/5

B2L/2, 2L/3, 2L/4, 2L/5, 2L/6

C4L/1, 4L/2, 4L/3, 4L/4, 4L/5

D4L/1, 4L/3, 4L/5, 4L/7, 4L/9

✓ Correct answer

A: 2L/1, 2L/2, 2L/3, 2L/4, 2L/5

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2018 Paper 1 Variant 2, question 24.

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