The Total solution for NCERT class 6-12
Two amplifiers are connected one after the other in series(cascaded). The first amplifier has a voltage gain of 10 and the second has avoltage gain of 20. If the input signal is 0.01 volt, calculate the output acsignal.
Voltage gain of the first amplifier, V1 = 10
Voltage gain of the second amplifier, V2 = 20
Input signal voltage, Vi =0.01 V
Output AC signal voltage = Vo
The totalvoltage gain of a two-stage cascaded amplifier is given by the product ofvoltage gains of both the stages, i.e.,
V = V1 × V2
= 10 × 20 =200
V0 = V × Vi
= 200 ×0.01 = 2 V
Therefore, the output AC signal of the given amplifier is2 V.