Voltage gain of two-stage RC coupled amplifier in low and mid-frequency range

This video lecture covers the determination of expression of voltage gain for two-stage RC coupled amplifier in low and mid-frequency range. We have started with assumptions required for the construction of equivalent circuit corresponds to two-stage RC coupled amplifier in low frequency range. We have also studied the modification in equivalent circuit required for the construction of circuit for two-stage RC coupled amplifier in mid frequency range. We have come up with voltage gain is directly related to frequency (f) of low frequency range whereas it is completely independent of f in mid frequency range.