Question

difference b/w bjt and fet

Answer 1

BJT's are Bipolar Junction Transistors, they use a process of electrons and holes in their operation. They convert the voltage between the base and emitter into a collector current usually with some gain. Some say its a current in current out model, but this is only one way of looking a the models.
FET's are Field Effect Transistor, they also use the process of electrons and holes in their operation. Generally you use the voltage between the gate and source to the control drain current, unlike BJT's its input impedance. at gate, in very large, usually considered infinite, while the BJT has a finite input impedance, between base and emitter, usually hie, an h parameter.

Answer 2

thanks!

Answer 3

BJT is a bipolar junction transistor which uses both holes and electrons but FET is an field effect transistor which uses either of them