A student investigates how the current in a miniature heating element changes with the potential difference across it.
The student uses their experimental results to calculate the resistance of the heating element.
The results are shown in Table 1.
| Potential difference (V) | Current (A) | Resistance (Ω\OmegaΩ) |
|---|---|---|
| 2.0 | 0.15 | 13 |
| 4.0 | 0.26 | 15 |
| 6.0 | 0.35 | 17 |
| 8.0 | 0.42 | |
| 10.0 | 0.48 | 21 |
| 12.0 | 0.52 | 23 |
Calculate the value of resistance that is missing from Table 1.
59 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.