Question

In a common emitter transistor, the phase difference between input and output is:

• A. zero
• B. $\pi /2$
• C. $\pi /3$
• D. $\pi$

Answer 1

The correct option is D $\pi$

The input signal voltage and the emitter output voltage remain in the opposite phase, i.e., ${180}^{\circ }$ or $\pi$ out of phase.

So, option (D) is correct.