The triodes P and Q have the same amplification factor 40. Their plate resistances are `4kOmega` and `8kOmega`, respectively. If an amplifier circuit is designed using anyone of them and a load resistance is of `8kOmega`, the ratio of the voltage gain obtained from them will beA. `2:3`B. `4:3`C. `3:1`D. `1:2`

The triodes P and Q have the same amplification factor 40. Their plate

1.	The triodes P and Q have the same amplification factor 40. Their plate resistances are `4kOmega` and `8kOmega`, respectively. If an amplifier circuit is designed using anyone of them and a load resistance is of `8kOmega`, the ratio of the voltage gain obtained from them will beA. `2:3`B. `4:3`C. `3:1`D. `1:2`
Answer» Correct Answer - B `mu=40`=amplification factor `mu_(p) = mu_(Q)=40` `r_(P)=4kOmega,r_(Q) = 8kOmega` `R_(L) = 8kOmega` Voltage gain for triode A `(muR_(L))/(r_(p)+R_(L))` For triode `P=A_(P) =(40 xx 8)/(4+8)` `A_(Q) = (40 xx 8)/(4+8)` `A_(P)/A_(Q) = ((40 xx 8)/(4+8))/((40 xx 8)/(8+8))=16/12 = 4/3`

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