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JEE Main & Advanced Physics Semiconducting Devices JEE PYQ-Semiconducting Devices

  • question_answer
    In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be:                                   [JEE Main 2017]

    A)

    B)  

    C)

    D)

    Correct Answer: B

    Solution :

    [b] In common emitter amplifier circuit input and output voltage are out of phase. When input voltage is increased then \[{{i}_{b}}\] is increased,\[{{i}_{c}}\] also increases so voltage drop across\[{{R}_{c}}\]is increased. However increase in voltage across \[{{R}_{C}}\] is in opposite sense.


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