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Edexcel A-Level Physics AS 2.3.38 Core Practical 4 Speed of Sound in Air Questions

Practise Edexcel IAL Physics 2.3.38 by measuring sound speed with microphones and oscilloscope traces, finding resonance frequency and using antiphase positions.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • use microphone separation and oscilloscope time delay to calculate speed of sound
  • find frequency or period from oscilloscope divisions and signal-generator resonance
  • use antiphase microphone positions to determine wavelength before calculating wave speed

Edexcel A-Level Physics AS 2.3.38 Core Practical 4 Speed of Sound in Air Questions question 1

[Maximum number: 2]

A student investigated the interference of sound waves. The student used a signal generator with two loudspeakers, as shown.

Figure for Question Edexcel A-Level Physics AS 2.3.38 Core Practical 4 Speed of Sound in Air Questions question 1 — Edexcel A-Level Physics AS

The student used this investigation to determine the speed of sound in air.

To determine an accurate value for the speed of sound, the student would need to use other apparatus.

Explain what other apparatus the student would need.

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