The field-effect transistor (FET) is a type of transistor that uses an electric field to control the flow of current in a semiconductor. ... FETs control the flow of current by the application of a voltage to the gate, which in turn alters the conductivity between the drain and source.

What do you mean by field effect transistor?

Field-Effect Transistor: A transistor in which the voltage on one terminal (the gate) creates a field that allows or disallows conduction between the other two terminals (the source and drain).

What is the use of a field effect transistor?

A field-effect transistor (FET) is a type of transistor commonly used for weak-signal amplification (for example, for amplifying wireless signals). The device can amplify analog or digital signals. It can also switch DC or function as an oscillator.