Question

Forward current of 75mA passes through a diode for a forward drop of 0.6V. Find the forward resistance of the diode.

• A. 7Ω
• B. 8Ω
• C. 9.3 kΩ
• D. 10.7 kΩ

Hint:

Ohm's law can be applied to diodes to calculate the resistance in the forward bias condition. Use \( R = \frac{V}{I} \) where V is the forward voltage drop and I is forward current.

Answer 1

The Correct Option is B

Step 1: We are given the forward current \( I_F = 75 mA \) and the forward voltage drop \( V_F = 0.6 V \). We have to find the forward resistance \( R_F \).
Step 2: Using Ohm's Law, which states \( V = IR \), the forward resistance \( R_F \) can be calculated as: \[ R_F = \frac{V_F}{I_F} = \frac{0.6}{75 \times 10^{-3}} = \frac{0.6}{0.075} = 8 \, \Omega \]