Question

If the forward voltage in a semiconductor diode is changed from $0.5V$ to $0.7V$, then the forward current changes by $1.0mA$. The forward resistance of diode junction will be

• A. $100$$\Omega$
• B. $120$$\Omega$
• C. $200$$\Omega$
• D. $240$$\Omega$

Answer 1

Answer: (C)

$200$$\Omega$

Forward resistance = $\frac{\Delta V}{\Delta I}=\frac{0.7-0.5}{1.0\times {10}^{-3}}=200\Omega$