1.

In a common emitter (CE) amplifier having a voltage gain G, the transistor used has tranconductance 0.02 mho and current gain 20, the voltage gain will be:

Answer»

` 5/4 G`
`2/3G`
1.5 G
`1/3 G`

Solution :Voltage GAIN, `A_(V)=g_(m)xxR_(L)` (in magnitude)
or `A_(V)propg_(m)`
`:. A_(V_(2))/A_(V_(1))=g_(m_(2))/(g_(m_(1))) or A_(V_(2))/G=0.02/0.03=2/3 or A_(V_(2))=(2G)/3`


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