For a common-emitter amplifier, the voltage gain is 40 . Its input and output impedances are 100 and 400 , respectively. The power gain of the CE amplifier will be

Step-by-step solution

Power gain =( voltage gain ) ( current gain ) aligned & Current gain = output current Input current = V ₀ z ₀ V _ i z _ i & = V ₀ ~V _ i z _ i z ₀ = 40 100 400 =10 aligned Power gain =40 10=400