A) \[60\,k\Omega \]
B) \[40\,k\Omega \]
C) \[30\,k\Omega \]
D) \[5\,k\Omega \]
Correct Answer: A
Solution :
\[{{r}_{i}}=\frac{\Delta {{I}_{B}}}{\Delta {{V}_{BE}}}=\frac{0.2\,\,V}{34\,\,\mu A}=60\,\,K\Omega \]
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