Two lamps, P and Q, are connected in parallel with a battery. A switch is placed in the branch containing lamp P only. The switch is then opened. What happens to lamp Q?
It goes out, because the circuit through it is now broken
It becomes dimmer, because the total resistance has risen
It becomes brighter, because all the current now flows in it
It stays lit, because there is still a complete path in it
38 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.