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easyMCQNEET 2020 E12026Physics
1 mark

For transistor action, which of the following statements is correct?

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

Solution & Step-by-step Explanation

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For proper transistor action:The base region must be very thin and lightly doped to allow most charge carriers to pass from emitter to collector.The emitter is heavily doped and the collector is moderately doped.For active mode, emitter-base junction is forward biased and collector-base junction is reverse biased.

Practice this question

Try it yourself before checking the explanation above.

For transistor action, which of the following statements is correct?
A
Base, emitter and collector regions should have same doping concentrations.
B
Base, emitter and collector regions should have same size.
C
Both emitter junction as well as the collector junction are forward biased.
D
The base region must be very thin and lightly doped.

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