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With the help of a labelled circuit diagram, explain how an n-p-n transistor can be used as an amplifier in common-emitter configuration. Explain how the input and output voltages are out of phase by 180 for a common-emitter transistor amplifier.

Answer

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Knowledge Check

  • In a common emitter amplifier, the input and output voltage are out of phase by

    A
    30°
    B
    90°
    C
    120°
    D
    180°

  • If a transistor is used in common -emitter mode as an amplifier,then

    A
    the base -collector junction is forward biased
    B
    the base -emitter junction is reverse biased
    C
    the input signal is connected in series with the voltage applied to the base -emitter junction
    D
    the input signal is connected in series with the voltage applied to the base -collector junction

  • A transistor is used in a common emitter mode as an amplifier. Then

    A
    the base emitter junction is reverse biased
    B
    the collector base junction is forward biased
    C
    the input signed is connected in parallel with the voltage applied to the base emitter junction
    D
    the input signal is connected in series with the voltage applied to the base emitter junction

    • Similar Questions

    Explore conceptually related problems

    Draw circuit diagram for n-p-n transistor to draw input and output characteristics in common base configuration. Draw the input and ouput curves and explain them.

    Draw the circuit diagram of a common emitter transistor amplifier. Write the expression for its voltage gain. Explain , how the input and output signal differ in phase by 180^(@)

    Draw a neat circuit diagram for n npn transistor used as a common emitter amplifier, and explain its working.

    Derive relation between current gain in common base and common-emitter transistor amplifiers.

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