Plate resistance of two triode valves is $2\ k\Omega$ and $4\ k\Omega$, amplification factor of each of the valves is 40. The ratio of voltage amplification, when used with $4\ k\Omega$ load resistance, will be

Question

Dr. Abubacker · Accepted Answer

(b) Voltage amplification $A_{v} = \frac{\mu}{1 + \frac{r_{p}}{R_{L}}} = \frac{\mu\ R_{L}}{R_{L} + r_{p}}$
$\Rightarrow \frac{A_{1}}{A_{2}} = \frac{4 + 4}{2 + 4} = \frac{4}{3}$

Q. Plate resistance of two triode valves is $2\ k\Omega$ and $4\ k\Omega$, amplification factor of each of the valves is 40. The ratio of voltage amplification, when used with $4\ k\Omega$ load resistance, will be

Explanation

Reviewed by Dr. Abubacker

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