Hey,
The output resistance of a CE amplifier is Rc || ro ≈ Rc.
If no RC is used, then the output resistance of the amplifier would be very small, which results in a large attenuation since the amplifier's gain consists of the term: Rout / ( Rout + RL), where RL is the load's resistance.
Just reminding that the output signal is current, therefore we would want Rout >> RL.
The output resistance of a CE amplifier is Rc || ro ≈ Rc.
If no RC is used, then the output resistance of the amplifier would be very small, which results in a large attenuation since the amplifier's gain consists of the term: Rout / ( Rout + RL), where RL is the load's resistance.
Just reminding that the output signal is current, therefore we would want Rout >> RL.