Question

A zener diode used as voltage regulator is connected (i) in forward bias (ii) in reverse bias (iii) in parallel with load (iv) in series with load (A) (i) and (ii) are correct (B) (ii) and (iii) are correct (C) only (i) is correct (D) only (iv) is correct

Name: Problem 2623, Chapter 19: JEE Physics
Uploaded: 2022-01-15T19:37:45-08:00
Duration: 1 min 39 s
Channel: Varsha Aggarwal
Description: A zener diode used as voltage regulator is connected (i) in forward bias (ii) in reverse bias (iii) in parallel with load (iv) in series with load (A) (i) and (ii) are correct (B) (ii) and (iii) are correct (C) only (i) is correct (D) only (iv) is correct

   A zener diode used as voltage regulator is connected
(i) in forward bias
(ii) in reverse bias
(iii) in parallel with load (iv) in series with load
(A) (i) and (ii) are correct
(B) (ii) and (iii) are correct
(C) only (i) is correct
(D) only (iv) is correct

JEE Physics

StemEZ 1st Edition

Chapter 19, Problem 2623

Instant Answer

Solved by Expert Varsha Aggarwal

01/15/2022

Step 1

(i) In forward bias, a zener diode will behave like a regular diode, allowing current to flow easily in one direction. This is not the desired behavior for a voltage regulator, so this option is incorrect. (ii) In reverse bias, a zener diode will break down at a Show more…

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A zener diode used as voltage regulator is connected (i) in forward bias (ii) in reverse bias (iii) in parallel with load (iv) in series with load (A) (i) and (ii) are correct (B) (ii) and (iii) are correct (C) only (i) is correct (D) only (iv) is correct

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Key Concepts

Zener Diode

A zener diode is a specially designed diode that allows current to flow in the reverse direction when the applied voltage exceeds its breakdown voltage. This property enables it to maintain a nearly constant voltage, making it ideal for use in voltage regulation circuits.

Reverse Bias Operation

In the context of semiconductor devices, reverse bias refers to the condition where the p-n junction is subjected to a voltage that opposes the built-in potential. For zener diodes, operating in reverse bias is essential because it is in the breakdown region that the diode stabilizes the voltage across it.

Voltage Regulation

Voltage regulation is a critical aspect of power supply design where the objective is to maintain a constant voltage level despite fluctuations in load or input voltage. Zener diodes are commonly used in this application because, when connected in reverse bias and in parallel with the load, they can clamp the voltage to a predetermined level.

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