Topic: Electronic Devices and Circuits
How does the dynamic resistance of diode vary with temperature?
- A. Directly proportional
- B. Inversely proportional
- C. Independent
- D. Directly to the square of temperature
Answer: A. Directly proportional
Explanation: Dynamic resistance $R_d = \frac{dV}{dI} = \frac{\eta V_T}{I}$.
Thermal voltage $V_T = \frac{T}{11600}~\text{V}$.
Thus, $R_d \propto T$ (Directly proportional).