A common emitter amplifier has a voltage gain of 50, an input impedance of `100Omega` and an output impedance of 200 `Omega`. The power gain of the amplifier is :-

Options

A. 1250
B. 50
C. 500
D. 1000

Explanation

`A_(V) = 50`
`R_("out") l = 200 Sigma`
`(50)/( 2) = beta_(ac)`
`A_(p) = beta(ac)^(3) xx (R_(uvt))/( R_(sn)) = (25)^(2) xx (200)/( 100) = 1250`