FET (field-effect transistors)

A Field-Effect Transistor (FET) is a type of electronic switch or amplifier that controls electrical current using an electric field. It has three main parts: the source, drain, and gate. When voltage is applied to the gate, it creates an electric field that opens or closes a channel between the source and drain, allowing current to flow or stop. FETs are fundamental in electronics because they can precisely control large currents with minimal power, making them essential for digital devices, sensors, and signal processing.