question_answer

When a silicon PN junction is in forward biased condition with series resistance, it has knee voltage of 0.6 V. Current flow in it is 5 mA, when PN junction is connected with 2.6 V battery, the value of series resistance is

A) \[100\Omega \]  

B) \[200\Omega \]

C) \[400\Omega \]

D) \[500\Omega \]

Correct Answer: C

Solution :

[c] \[R=\frac{(2.6-0.6)}{5\times {{10}^{-3}}}=400\Omega \]