Question

For transistor action, which of the following statements are correct :

• A. Base, emitter and collector regions should have similar size and doping concentrations.
• B. The base region must be very thin and lightly doped
• C. Both the emitter junction and collector junction are reversed biased
• D. Both the emitter junction as well as the collector junction are forward biased

Answer 1

The correct option is B

The base region must be very thin and lightly doped

The emitter junction is forward biased and collector junction is reversed biased and the base region of a transistor provides an interaction between the emitter and collector of transistor and this region is made thin to reduce the recombination of holes and electrons in this region , so that there is appreciable collector current.