A student investigates how the resistance of a miniature indicator lamp changes with potential difference. Their results are shown in Table 1.
Table 1
| Potential difference (V) | Current (A) | Resistance (Ω\OmegaΩ) |
|---|---|---|
| 2.0 | 0.15 | 13 |
| 4.0 | 0.24 | 17 |
| 6.0 | 0.31 | 19 |
| 8.0 | 0.36 | 22 |
| 10.0 | 0.40 | 25 |
The student writes this conclusion:
'The resistance of the indicator lamp is directly proportional to the potential difference.'
Comment on the student's conclusion. Use data from Table 1 in your answer.
59 exam-style questions on Edexcel GCSE Physics 10.2 Resistance. Each one has a worked solution and a mark scheme showing where the marks go.