A thermistor and a fixed resistor are connected on separate parallel branches to a d.c. power supply. A switch is in the wire between the supply and the junction where the current divides between the branches. The switch is opened. What happens to the current through the thermistor?
It continues unchanged because there is no switch in the thermistor branch
It decreases but continues because current can return through the resistor branch
It increases because the current no longer needs to split at the junction
It stops because the switch breaks the conducting path shared by both branches
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.