For Transistor Action, Which of the Following Statements Are Correct: the Emitter Junction is Forward Biased and Collector Junction is Reverse Biased.The Base Region Must Be Very Thin and Lightly Doped - Physics

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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.

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Solution

The correct statement is (b)(c).

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

Concept: Junction Transistor - Feedback Amplifier and Transistor Oscillator
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Chapter 14: Semiconductor Electronics: Materials, Devices and Simple Circuits - Exercise [Page 510]

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NCERT Physics Class 12
Chapter 14 Semiconductor Electronics: Materials, Devices and Simple Circuits
Exercise | Q 6 | Page 510
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