A student connects identical 15 Ω resistors in parallel to a 6.0 V supply. The student records the total current for different numbers of branches.
The results are shown in the table.
| Number of branches | Total current from the supply |
|---|---|
| 1 | 0.40 A |
| 2 | 0.80 A |
| 3 | 1.20 A |
Calculate the total current when there are four branches and explain why adding a branch changes the total resistance.
94 exam-style questions on AQA GCSE Physics 2.2 Series and parallel circuits, covering 2.2 Series and parallel circuits. Each one has a worked solution and a mark scheme showing where the marks go.