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) The emitter junction is forward biased and collector junction is reverse biased. (d) Both the emitter junction as well as the collector junction are forward biased.

Answer 1

In the case of a transistor action, there are three regions: base, emitter and collector. The junction in transistor action should be lightly doped so that the base region becomes very thin. For transistor action, the emitter junction should be forward biased and the collector junction should be reverse biased.

Hence, the correct statements are (b) and (c).