Physics Semiconductor Electronics JEE (Main) / AIEEE Problems ( Previous Years ) MCQ (Single Correct)

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

A
180°
B
45°
C
90°
D
135°

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Text Solution

Verified by Experts
The correct answer is:
A

The change in is the output voltage . From equation we get

The voltage gain of the amplifier is

The negative sign represents that output voltage is opposite with phase with the input voltage.

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