A circuit has three parallel indicator branches. The current readings are shown in the table.
| Circuit state | Main current | Branch A current | Branch B current | Branch C current |
|---|---|---|---|---|
| All branches connected | 1.46 A | 0.38 A | 0.51 A | Not recorded |
| Branch C disconnected | 0.89 A | 0.38 A | 0.51 A | 0 A |
Calculate the current in branch C when all three branches are connected.
Explain whether the readings after branch C is disconnected are consistent with the expected behaviour of a parallel circuit.
81 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.