AC current gain for transistor in common emitter amplifier is 20. If input and output resistances are `2 k Omega` and `5 K Omega` respectively, find: Power gain

Explanation

AC current gain `=beta_(a.c)= 20`
`R_(i)=2 k Omega= 2000Omega`
`R_(o)= 5k Omega= 5000Omega`
For CE mode
Power gain `= beta_(ac) xx A_(v)`
`=20 xx 50`
1000