Question

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

• A. $100\Omega$
• B. $200\Omega$
• C. $400\Omega$
• D. $500\Omega$

Answer 1

The correct option is C $400\Omega$

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