In the common emitter mode of a transistor when the collector emitter voltage is changed by $0.4…
In the common emitter mode of a transistor when the collector emitter voltage is changed by $0.4 \mathrm{~V}$, the collector current changes by $0.04 \mathrm{~mA}$. The output resistance is
$20 \mathrm{k} \Omega$
$10 \mathrm{k} \Omega$
$5 \mathrm{k} \Omega$
$1 \mathrm{k} \Omega$
Solution
The output resistance is given by
$R=\frac{\Delta V}{\Delta I}=\frac{0.4}{0.04 \times 10^{-3}}=10 \mathrm{k} \Omega$