An aerospace engineer is testing a micro-sensor array where multiple identical resistive sensor channels can be activated in parallel across a constant regulated potential difference of 1.80 V.
The engineer records the total current drawn by the array as the number of active channels is increased.
| Number of active channels in parallel | Total current in μA\mu\text{A}μA | Potential difference in V\text{V}V |
|---|---|---|
| 1 | 6.40 | 1.80 |
| 2 | 12.80 | 1.80 |
| 3 | 19.20 | 1.80 |
| 4 | 1.80 |
Using the data in the table, predict the total current drawn from the regulated power supply when there are 4 active channels connected in parallel.
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.