Zener Diode
Zener Diode: Overview
This topic covers concepts such as Avalanche Breakdown, Zener Diode, Zener Diode as Voltage Stabiliser, V-I Characteristics of a Zener Diode, Different Types of Breakdown of Diode in Reverse Bias, Zener Breakdown, etc.
Important Questions on Zener Diode
Which of the following is/are correct
(i) The symbol for zener diode is
(ii) The reverse I – V characteristics of a zener diode.

The following characteristics. Curve is of a:



What is maximum power rating of a Zener diode?


How do you calculate power dissipated in Zener diode?

The breakdown that occurs in reverse bias conditions in a narrow junction diode is known as

A Zener diode, having breakdown voltage equal to , is used in a circuit shown in the figure. If the applied voltage is , the current through the Zener diode is . The value of is

What is the order of the reverse saturation current before breakdown in a zener diode?

Identify characteristics are given below, in the order (i), (ii), (iii), (iv):
i. ii.
iii. iv.

The reading corresponding to zener diode are given below in the table. From given table, determine the reverse breakdown voltage of the zener diode.
Forward bias | Reverse bias | ||
(volt) | (volt) | ||

A Zener diode is used for the following purposes.


In a zener diode regulated power supply, unregulated DC input of is applied. If the resistance connected in series with a zener diode is and the zener voltage , the current across the resistance is

Identify characteristics are given below, in the order (i), (ii), (iii), (iv):
i. ii.
iii. iv.

For given circuit find out current through zener diode.


What will be the current flowing through the resistor in the circuit shown, where the breakdown voltage of the Zener is ?

A Zener diode having break- down voltage 5.6 V is connected in reverse bias with a battery of emf 10 V and a resistance of in series. The current flowing through the Zener is
