2025Q2(iii)(b)Sound

Short answerEasy1 mark

2(iii)

The displacement–time graph of a sound wave produced by a vibrating wire is shown below.

Figure for this question

Which characteristic of sound is affected by the reduction in the length of PR?

Topic: Pitch and frequency

Question wording verified against source paper

Answer

Exam answer

Pitch.

Explanation

Pitch depends on frequency; reducing PR increases frequency and therefore raises pitch.

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