What is the function of an electrical sensor?

An electrical sensor is designed to detect changes in the environment, which encompasses a wide range of phenomena such as temperature, light, motion, or pressure. When a sensor responds to a specific stimulus, it converts that information into an electrical signal that can be measured or recorded. This ability to detect environmental changes makes sensors essential in various applications, from simple temperature monitoring devices to complex automated systems in industrial settings.

The other options do not accurately describe the primary function of a sensor. For example, storing electric charge relates more to capacitors, which serve a different purpose in electronics. Increasing voltage in a circuit pertains to devices like transformers or voltage boosters rather than sensors. Finally, measuring electric current is a function of ammeters, which specifically gauge the flow of electric charge rather than detecting environmental changes.