A battery supplies two parallel branches. One branch contains lamp P alone. The other branch contains lamp Q and switch S in series. A second switch, T, is in the common wire between the battery and the point where the circuit divides into branches. Initially, T is closed and S is open.
Describe what happens to lamps P and Q when switch S is closed. Explain your answer. Then predict what happens to both lamps if switch T is opened, and explain your prediction.
94 exam-style questions on Edexcel GCSE Physics 10.1 Circuits, charge and current, covering 10.1.1 Structure of the atom, 10.1.2 Circuit diagrams and symbols, 10.1.3 Series and parallel circuits, 10.1.4 Potential difference and voltmeters, 10.1.5 Energy transferred, charge and potential difference, and 10.1.6 Current, ammeters and charge flow. Each one has a worked solution and a mark scheme showing where the marks go.