# Zener diodes

In the given circuit we have to find the output voltage , the voltage drop across resistance RL (RL = 10KΩ) and the current through the zener diode having zener voltage VZ = 50V

By this question I want to be clear about the way to solve circuits with zener diode...please explain the reasoning.. I have studied that in forward bias , zener diode is shorted..in reverse it is open.. but how to apply it... please explain somewahat in this problem..!!

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berkeman
Mentor
In the given circuit we have to find the output voltage , the voltage drop across resistance RL (RL = 10KΩ) and the current through the zener diode having zener voltage VZ = 50V

By this question I want to be clear about the way to solve circuits with zener diode...please explain the reasoning.. I have studied that in forward bias , zener diode is shorted..in reverse it is open.. but how to apply it... please explain somewahat in this problem..!!

No, in reverse bias a Zener diode is not open. Can you show us the V-I characteristic curve of a typical Zener diode? When you read about Zener diodes on wikipedia.org, what does it say? How does avalanche breakdown come into play?

See first of all I would like you to give me the way how you would solve the circuit I gave...so that I can be somewhat clear...

berkeman
Mentor
See first of all I would like you to give me the way how you would solve the circuit I gave...so that I can be somewhat clear...

No, that's not how the PF works. We require that you show some effort of your own, before we can provide tutorial help. Especially since the wikipedia entry is fairly clear and instructive.

bur what I want to be clear about is not there in wikipedia..I am familiar with that theory but not getting how to apply...!! here the diode is in reverse bias..but how to move on further....
I am actually not getting this thing.. I really need your help..

berkeman
Mentor
bur what I want to be clear about is not there in wikipedia..I am familiar with that theory but not getting how to apply...!! here the diode is in reverse bias..but how to move on further....
I am actually not getting this thing.. I really need your help..

What are you not understanding about the V-I characteristic of a Zener diode? What do those curves look like? How can you use that curve to determine the voltages and currents in the circuit that you drew?

CWatters