Thermostat - GCSE Physics Definition

A thermostat is a device that helps control the temperature of a space, like a house or a classroom, by turning the heating or cooling system on or off. It works by measuring the current temperature, generally using a thermistor, and comparing it to the temperature you have set. Thermistors resistance decreases as temperature increases, which make them a useful tool in determining temperature. If the room is too hot or too cold, the thermostat sends a signal to the heating or cooling system to adjust the temperature. This helps maintain a comfortable environment and can also save energy by preventing the system from working unnecessarily.