A temperature alarm in a reptile enclosure contains a sensing component.
Which circuit symbol represents the component that should be used to detect changes in temperature?
An arrowhead pointing towards a short vertical line
A rectangle with nothing drawn inside or across it
A small rectangle with a line running lengthways through it
A rectangle crossed by a diagonal line ending in a short bar
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.