The Figure shows six circuit symbols, labelled P, Q, R, S, T and U.
Figure

Give the name of the component represented by each of the symbols P, Q, R and S.
Symbols T and U both represent a source of potential difference.
Explain how the component represented by T is different from the component represented by U.
State which part of symbol U represents the positive terminal.
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.