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Physics (AS & A Level) · Oct / Nov 2025 · Paper 14 · Question 29

9702Stationary waves

A wire is fixed at both ends and is vibrated by a source of frequency f. A stationary wave is formed on the wire with a total of two antinodes. The frequency of the source is increased to 3f and a new stationary wave is formed. What is the total number of antinodes on the new wave?

  1. A4
  2. B5
  3. C6
  4. D9

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Correct answer: C. 6

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