A student obtains the results shown in the table. The same magnet follows the same path in every trial.
| Number of turns | Speed in m/s\mathrm{m/s}m/s | Peak potential difference in V\mathrm{V}V |
|---|---|---|
| 100 | 0.20 | 0.30 |
| 100 | 0.40 | 0.60 |
| 200 | 0.20 | 0.60 |
Assume both proportional relationships shown continue. What peak potential difference is predicted for 300 turns at 0.60 m/s?
0.9 V0.9\ \mathrm{V}0.9 V
1.8 V1.8\ \mathrm{V}1.8 V
5.4 V5.4\ \mathrm{V}5.4 V
2.7 V2.7\ \mathrm{V}2.7 V
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.