A student investigated how the total resistance of identical resistors connected in parallel varied with the number of resistors.
The student repeated each measurement of resistance three times. The table below shows some of the results for 3 resistors in parallel:
| Number of resistors | Reading 1 (Ω\OmegaΩ) | Reading 2 (Ω\OmegaΩ) | Reading 3 (Ω\OmegaΩ) | Mean (Ω\OmegaΩ) |
|---|---|---|---|---|
| 3 | 22.4 | 22.9 | YYY | 22.5 |
Calculate the value of Y Y\,Y in the table.
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.