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MHT CET202411 May 2024Evening ShiftPhysicsSemiconductorsActual

When n-p-n junction transistor is used as an amplifier in common emitter mode,

Options

  1. Athe input impedance is high and the output impedance is low.
  2. Bthe base emitter junction is reverse biased.
  3. Cinput signal is applied between the base and emitter and output is obtained between collector and emitter.
  4. Dthe input voltage and output voltage are in phase.

Correct answer

C. input signal is applied between the base and emitter and output is obtained between collector and emitter.

Step-by-step solution

Common Emitter Configuration: In this configuration, the emitter terminal is common to both the input and output sides of the circuit. The input signal is applied across the base-emitter junction. The output is taken across the collector-emitter junction. Biasing: For proper operation, the base-emitter junction should be forward-biased, not reverse-biased as mentioned in Option B. Therefore, Option B is incorrect. Phase Relationship: The output voltage is inverted with respect to the input voltage, meaning they are

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