Question

When the forward bias voltage of a diode is changed froth $0.6V$ to $0.7V$, the current changes from $5mA$ to $15mA$. Then its forward bias resistance is:

• A. $0.01$$\Omega$
• B. $0.1$$\Omega$
• C. $10$$\Omega$
• D. $100$$\Omega$

Answer 1

The correct option is C $10$$\Omega$

Forward bias resistance $=\frac{\Delta V}{\Delta I}$$=\frac{(0.7-0.6)V}{(15-5)mA}=\frac{0.1}{10\times {10}^{-3}}=10\Omega$