PhysicsCode 9702
Practical circuits
What this topic asks you to be able to do
- recall and use the circuit symbols that section 6 sets out
- draw and interpret circuit diagrams built from the circuit symbols that section 6 sets out
- define the electromotive force (e.m.f.) of a source as the energy it transfers per unit charge when it drives charge round a complete circuit, and use this definition
- distinguish between e.m.f. and potential difference (p.d.) by looking at them from the standpoint of energy
- understand how the internal resistance of an e.m.f. source affects the terminal potential difference