Question

The current gain of a transistor in a common base arrangement is `0.95`. Find the voltage gain and power gain if the load resistance of output circuit is `400kOmega` and the input resistance is `200Omega`.

Answer 1

Here, `alpha=0.95, R_(0)=400xx10^(3)Omega`,
`R_(i)=200Omega`
As voltage gain `=alphaR_(o)/R_(i)=0.95xx(400xx10^(3))/200`
`=1900`
Power gain= voltage gain xx current gain
`= 1900xx0.95=1805`