A musician plays a continuous note on a synthesizer. An observer notices that, although the pitch of the sound does not change, the loudness is repeatedly turned up and down by the player.
Which row in the table describes the amplitude and the frequency of the sound waves?
AmplitudeFrequencyAconstantconstantBconstantvaryingCvaryingconstantDvaryingvarying \begin{array}{|c|c|c|} \hline & \text{Amplitude} & \text{Frequency} \\ \hline \text{A} & \text{constant} & \text{constant} \\ \hline \text{B} & \text{constant} & \text{varying} \\ \hline \text{C} & \text{varying} & \text{constant} \\ \hline \text{D} & \text{varying} & \text{varying} \\ \hline \end{array} ABCDAmplitudeconstantconstantvaryingvaryingFrequencyconstantvaryingconstantvaryingAmplitude: constant, Frequency: constant
Amplitude: constant, Frequency: varying
Amplitude: varying, Frequency: constant
Amplitude: varying, Frequency: varying
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.