A) \[\text{10}\,\text{k}\Omega \]
B) \[20\,\text{k}\Omega \]
C) \[5\,\text{k}\Omega \]
D) \[2.5\,\text{k}\Omega \]
Correct Answer: A
Solution :
Here: \[\Delta {{V}_{c}}=0.5\,volt,\] \[\Delta {{I}_{c}}=0.05\,mA=0.05\times {{10}^{-3}}A\] Output resistance is given by \[{{R}_{out}}=\frac{\Delta {{V}_{c}}}{\Delta {{I}_{c}}}\] \[=\frac{0.5}{0.05\times {{10}^{-3}}}={{10}^{4}}\Omega =10k\Omega \]
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