field-effect transistor

A field-effect transistor (FET) is a device that controls the flow of 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 modulates the connection between the source and drain, allowing current to pass or stop. FETs are fundamental in electronic devices, acting as switches or amplifiers. They are efficient, small, and used in everything from smartphones to computers, enabling precise control of electronic signals.