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Question

A PNP transistor is operating in active region. If the emitter voltage decreases such that the emitter becomes less positive than the base while the biasing condition of the collector-base junction remains unchanged, the transistor will enter _______.

The correct answer is

Cut-off region

For a PNP transistor in the active region:

  • Emitter-Base junction: forward biased → emitter must be more positive than base.
  • Collector-Base junction: reverse biased.

If the emitter voltage decreases so that the emitter becomes less positive than the base:

  • The EB junction becomes reverse biased.
  • No emitter current flows → no collector current.
  • The transistor enters the cut-off region.
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Similar Questions

  1. A PNP transistor is fabricated with an increased base doping concentration while keeping all other physical dimensions and doping levels constant. What is the effect on the transistor's performance?

  2. In a properly biased PNP transistor operating in active region, the emitter terminal is _______.


Important Questions from Bipolar Junction Transistor

  1. Photo transistor is used for:

  2. The base of BJT is-

  3. The leakage current in an NPN transistor is due to the flow of:

  4. Which of the following transistor configuration has the lowest input resistance?

  5. In a junction transistor, recombination of electrons and holes occurs in

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