FET

FET stands for field effect transistor. As the name stands it works as transistor using the effect of the transistor. The FET is unipolar device unlike BJT which is a bipolar device. In FET only the majority charge carriers are responsible for the transistor action. There are various types of FET . They are
1. JFET
2.MOSFET

the above two are again subdivided into n-type and p-type FET's. The source and the drain indicate the type of the FET.