Electronic Devices and Circuits - Engineering

Q1:

For a NPN bipolar transistor, what is the main stream of current in the base region?

A Drift of holes

B Diffusion of holes

C Drift of electrons

D Diffusion of electrons

ANS:B - Diffusion of holes

Main stream of current in the base of NPN is due to diffusion of electrons from emitter. Hence D is the correct answer.