A theatre technician records two sound effects using the same moving-coil microphone in the same position.
| Sound effect | Maximum pressure variation from normal / Pa | Number of vibrations | Time interval / s |
|---|---|---|---|
| A | 0.12 | 84 | 0.30 |
| B | 0.18 | 130 | 0.50 |
Compare the amplitude and frequency of the electrical signal produced for sound effect B with the signal produced for sound effect A.
Use the data in your answer.
92 exam-style questions on Edexcel GCSE Physics 13.1 Inducing a current, covering 13.1.1 Producing an electric current by induction, 13.1.2 Factors affecting the induced potential difference, 13.1.3 Alternators and dynamos, and 13.1.4 Microphones and loudspeakers. Each one has a worked solution and a mark scheme showing where the marks go.