Question

For transistor action
(1) Base, emitter and collector regions should have similar
size and doping concentrations.
(2) The base region must be very thin and lightly doped.
(3) The eimtter-base junction is forward biased and basecollector
junction is reverse based.
(4) Both the emitter-base junction as well as the basecollector
junction are forward biased.
(a) (3) and (4) (b) (4) and (1)
(c) (1) and (2) (d) (2) and (3)

Answer 1

➡️ For transistor action, the base region must be very thin and lightly doped. Also, the emitter-base junction is forward biased and base-collector junction is reverse biased.

So your correct answer is Option D.