A thermistor is used in a circuit that switches a heater off when a room gets warm. What happens in the circuit as the room warms up?
The resistance of the thermistor rises, so the current in the circuit falls
The resistance of the thermistor falls, so the current in the circuit rises
The resistance of the thermistor falls, so the current in the circuit falls
The resistance of the thermistor rises, so the current in the circuit rises
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.