Q81 / 90 · JEE Main 2017 (02 Apr) · Physics

In a common emitter amplifier circuit using an n-p-n transistor, the phase difference between the input and the output voltages will be:

  • Correct answer
    A
    180°
  • B
    45°
  • C
    90°
  • D
    135°

Solution

In a common emitter amplifier circuit, the input voltage must be forward biased and output voltage must be reversed biased.

So the input voltage must be out of phase of output voltage.

Therefore, the phase difference between the input and output voltage is 180°.

Hence, the correct answer is option: 'A'.

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