In a circuit diagram, one long thin line is drawn next to one short thick line, and this pair of lines is drawn twice in a row. What does this part of the diagram represent?
One cell, which supplies half the potential difference of a battery
A fuse, which melts when the current in the circuit becomes too large
A battery of two cells, which supplies a larger potential difference
Two switches, which must both be closed for charge to flow round
82 exam-style questions on AQA GCSE Physics 2.1 Current, potential difference and resistance, covering 2.1.1 Standard circuit diagram symbols, 2.1.2 Electrical charge and current, 2.1.3 Current, resistance and potential difference, and 2.1.4 Resistors. Each one has a worked solution and a mark scheme showing where the marks go.