Question

A power diode is open circuited, and a reverse dc voltage is applied to get a faster turn-off time. During reverse recovery time
(a) When current is negative peak, voltage is zero
(b) When voltage is negative peak, current is zero
(c) When current is negative peak, voltage is not zero
(d) When voltage is negative peak, current is not zero
Choose the correct answer

• A. \( \text{(a) true, (c) true and (d) true} \)
• B. \( \text{(b) true, (c) true and (d) false} \)
• C. \( \text{(b) false, (c) false and (d) true} \)
• D. \( \text{(a) true, (c) false and (d) true} \)

Hint:

Remember the physical sequence during reverse recovery: 1. Current hits its negative peak first, while the voltage is still zero because the junction is full of carriers. 2. Voltage hits its negative peak later, while current is still decaying back toward zero. This phase shift between the current and voltage peaks prevents them from happening at the same time.

Answer 1

The Correct Option is D