A group of students set up a circuit to investigate how the number of identical resistors in parallel affects the total current from the power supply.
They measure the total current and the potential difference across the parallel combination.
| Number of resistors in parallel | Total current in mA | Potential difference in V |
|---|---|---|
| 1 | 14.0 | 4.50 |
| 2 | 28.0 | 4.50 |
| 3 | 42.0 | 4.50 |
| 4 | 4.50 |
Using the data in the table, predict the total current from the power supply when there are 4 of these identical resistors connected in parallel in the circuit.
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.