A student investigated how the current in an unknown electrical component varied with potential difference. The table below shows the results when the potential difference across the component was 8.0 V.
| Potential difference (V) | Current 1st reading (A) | Current 2nd reading (A) | Current 3rd reading (A) | Mean current (A) |
|---|---|---|---|---|
| 8.0 | 0.53 | 0.41 | 0.56 | YYY |
Calculate the mean value YYY.
39 exam-style questions on AQA GCSE Physics 2.1 Current, potential difference and resistance, covering 2.1.1 Standard circuit diagram symbols, 2.1.2 Electrical charge and current, 2.1.3 Current, resistance and potential difference, and 2.1.4 Resistors. Each one has a worked solution and a mark scheme showing where the marks go.