Rankers Physics

Zener Diode as a Voltage Regulator: Practice Problem & Solution

Consider the following statements (A) and (B) and identify the correct answer. (A) A zener diode is Connected in reverse bias, when used as a voltage regulator. (B) The potential barrier of p-n junction lies between $0.1$ V to $0.3$ V. (2021)
(A) and (B) both are incorrect.
(A) is correct and (B) is incorrect.
(A) is incorrect but (B) is correct.
(A) and (B) both are correct.

Solution Explained:

To solve this problem, we apply the core principles of Zener Diode as a Voltage Regulator. Understanding the underlying formula is key to arriving at the correct answer below:

Statement (A) is correct as Zener diodes exclusively operate in the reverse breakdown region for voltage regulation. Statement (B) is incorrect because the typical potential barrier is around $0.7$ V for Silicon and $0.3$ V for Germanium, not restricted to $0.1$ V to $0.3$ V.

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