Question 4
FA microphone detects a sound wave.
The Figure shows how the displacement of the air particles at the microphone changes with time.
Figure
a.[2]
Use the Figure to find the period of the wave.
Give your answer in s\text{s}s.
b.[2]
Use the equation: frequency=1period\text{frequency} = \dfrac{1}{\text{period}}frequency=period1
Calculate the frequency of the sound wave.
c.[2]
The speed of sound in air is 340 m/s.
Use the equation: wave speed=frequency×wavelength\text{wave speed} = \text{frequency} \times \text{wavelength}wave speed=frequency×wavelength
Calculate the wavelength of the sound wave.
d.[2]
The sound is made louder. The pitch of the sound stays the same.
Describe how the graph in the Figure would change.
5.1 Wave behaviour Questions
52 exam-style questions on OCR GCSE Physics 5.1 Wave behaviour, covering 5.1.1 Describing wave motion, 5.1.2 Wavelength and frequency, 5.1.3 Wave speed, frequency and wavelength, 5.1.4 Wave speed problems, 5.1.5 Transverse and longitudinal waves, 5.1.6 Sound waves crossing between media, 5.1.7 Reflection, transmission and absorption at interfaces, 5.1.8 Sound waves and vibrations in solids, 5.1.9 Frequency range and human hearing, 5.1.10 Modelling waves with water ripples and sound, and 5.1.11 Evidence that the wave travels, not the medium. Each one has a worked solution and a mark scheme showing where the marks go.