A straight wire is part of a complete circuit containing an ammeter. The wire is moved across a magnetic field, and the ammeter readings are recorded.
| Movement of wire | Ammeter reading |
|---|---|
| Downwards at 0.15 m/s | 0.10 mA left |
| Upwards at 0.15 m/s | 0.10 mA right |
| Downwards at 0.30 m/s | 0.20 mA left |
Explain what the ammeter reads when the wire is moved upwards at 0.30 m/s and then held stationary.
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.