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

Step-by-step solution

In a common emitter amplifier, the input signal is applied between the base and emitter, and the output is taken across the collector and emitter. The output voltage is given by V_ CE = V_ CC - I_C R_C . During the positive half cycle of the input signal, the forward bias across the base-emitter junction increases. This causes the base current I_B to increase, which in turn increases the collector current I_C . As I_C increases, the voltage drop across the collector resistor R_C increases. Consequently, the output