A Zener diode works on: A) zero bias B) reverse bias C) forward bias D) infinite bias - Padhle.Online
Students' favourite free learning app with LIVE online classes, instant doubt resolution, unlimited practice for classes 6-12, personalized study app for Maths, Science, Social Studies, video e-learning, online tutorial, and more. Download Now!

A Zener diode works on: A) zero bias B) reverse bias C) forward bias D) infinite bias

 Answer: (b) reverse bias


When a PN junction diode is heavily doped with impurities, the depletion layer’s breadth narrows due to the larger concentration of ions in the depletion layer than in a regularly doped PN junction diode. The voltage drop across the depletion layer is relatively large due to the thinner depletion layer. If a reverse voltage is provided to the Zener diode and then increased, the electrons within the depletion zone will come out and make the depletion region conductive after a specific applied voltage. This is referred to as a Zener breakdown. The voltage across the Zener diode remains virtually constant at this moment, but the current increases dramatically since the current route is conductive.

While the Zener diode behaves exactly like a normal PN junction diode when connected in forward bias, its property of a sharp breakdown voltage in reverse bias is why we use it as a voltage regulator because it will only allow current to flow beyond a certain voltage.

About the Author

Principal, Babu Daudayal SVM, Mathura

Post a Comment

Cookie Consent
We serve cookies on this site to analyze traffic, remember your preferences, and optimize your experience.
It seems there is something wrong with your internet connection. Please connect to the internet and start browsing again.
AdBlock Detected!
We have detected that you are using adblocking plugin in your browser.
The revenue we earn by the advertisements is used to manage this website, we request you to whitelist our website in your adblocking plugin.
Site is Blocked
Sorry! This site is not available in your country.