For transistor action:

(a) the base, emitter and collector regions should have similar size and doping concentrations.
(b) the base regions must be very thin and lightly doped.
(c) the emitter-base junction is forward biased and the base-collector junction is reverse biased.
(d) both the emitter-base junction as well as the base-collector junction are forward biased.

Which of the following pairs of statements is correct?
1. (d) and (a)
2. (a) and (b)
3. (b) and (c)                                       
4. (c) and (d)

Subtopic:  Types of Semiconductors |
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NEET - 2010
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