An engineer investigates how the current flowing through a thermoelectric cooling (TEC) plate changes as the potential difference across it is increased.
The engineer uses the experimental data to determine the electrical resistance of the TEC plate at each voltage step.
The results are recorded in Table 1.
| Potential difference (V) | Current (A) | Resistance (Ω\OmegaΩ) |
|---|---|---|
| 1.5 | 0.45 | 3.3 |
| 3.0 | 0.82 | 3.7 |
| 4.5 | 1.10 | 4.1 |
| 6.0 | 1.33 | 4.5 |
| 7.5 | 1.52 | |
| 9.0 | 1.68 | 5.4 |
Calculate the missing value of resistance in Table 1. Give your answer to an appropriate precision.
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.