The input resistance of a common emitter amplifier is 2 kohm and AC current gain is 20. If the load resistor used 5 kohm, calculate (i) voltage gain (ii) transconductance

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$$\begin{gathered} Voltage gain= current gain\times \frac{load resis\tan ce}{input resis\tan ce} \\ =20\times \frac{5\times {10}^3}{2\times {10}^3}=50 \\ transduc\tan ce = \frac{current gain}{input resis\tan ce}=\frac{20}{2\times {10}^3}=0.01 oh{m}^{-1} \end{gathered}$$

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