Sunday, August 22, 2010

EXPERIMENT3

Zener Diode.

 


A Zener diode is a type of diode that permits current not only in the forward direction like a normal diode, but also in the reverse direction if the voltage is larger than the breakdown voltage


 
 

 

2 x resistors, 1 x 5V1 400mW Zener diode (ZD).
For R= 100ohm and RL= 100ohm, Vs= 12 V.

What is the value of Vz?
5.02V


Vary Vs from 10V to 15V

What is the value of Vz?
5.08V

Explain what is happening here
The circuit is regulating the voltage.

What could this circuit be used for?
Voltage regulator.

Reverse the polarity of the zener diode.

What is the value of Vz? Make a short comment why you had that reading.

836mV. Reversed zener diode reduces current flowing through it but a small amount of current still flows.

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