Question

Zener diode is used for,
A. amplification
B. rectification
C. stabilisation
D. all of the above

Answer 1

Hint: A Zener diode is referred to a special kind of diode which has been designed to allow current to flow "backwards" in a consistent or accurate way when a particular set reverse voltage is reached. It is generally called the Zener voltage. Zener diodes are produced with a great variety of Zener voltages and many of them are variable also.

Complete step by step answer:
A Zener diode is made up of silicon. It allows the current to flow in either a forward or a reverse direction. The diode includes a specific heavily doped p-n junction which is being designed to conduct in the reverse direction when a particular specified voltage is achieved. When connected in the reverse mode, by the way it is mostly used, a small leakage current flows. As the reverse voltage reaches the breakdown voltage, a current begins flowing through the diode. After reaching the maximum, current will become constant and stabilised over a wide range of voltage. Therefore the use of zener diodes is to stabilise the current for a wide range of voltage.

So, the correct answer is “Option C”.

Note: The Zener diode is having a well-defined reverse-breakdown voltage at which it may begin its conducting current, and continues operating throughout in the reverse-bias mode without getting any damage. And also, the voltage drop across the diode is a constant over a wide range of voltages. This is a property that makes Zener diodes good for use in voltage regulation. Hence it is used in stabilisers for electronic devices. The Zener diode is working like a normal diode when it is in the forward-bias mode.