A student measures a resistor using three different supply settings. The table shows the readings.
| Potential difference / V\mathrm{V}V | Current / mA\mathrm{mA}mA |
|---|---|
| 2.0 | 50 |
| 4.0 | 100 |
| 6.0 | 150 |
What current would flow at 5.0 V if the resistance stays constant?
80 mA80\ \mathrm{mA}80 mA
125 mA125\ \mathrm{mA}125 mA
100 mA100\ \mathrm{mA}100 mA
200 mA200\ \mathrm{mA}200 mA
81 exam-style questions on Edexcel GCSE Physics 10.2 Resistance, covering 10.2.1 Current in a circuit and conservation at junctions, 10.2.2 Resistance and variable resistors, 10.2.3 Series and parallel resistance, 10.2.4 I–V characteristics of components, and 10.2.5 LDRs and thermistors. Each one has a worked solution and a mark scheme showing where the marks go.