zener diode as a voltage regulator

voltage regulator is a device that regulates the voltage level. It essentially steps down the input voltage to the desired level and keeps it at that same level during the supply. This ensures that even when a load is applied the voltage doesn’t drop. The voltage regulator is used for two main reasons, and they are: To vary or regulate the output voltage To keep the output voltage constant at the desired value in spite of variations in the supply voltage. Voltage regulators are used in computers, power generators, alternators to control the output of the plant. Zener Diode as a Voltage Regulator There is a series resistor connected to the circuit in order to limit the current into the diode. It is connected to the positive terminal of the d.c. It works in such a way the reverse-biased can also work in breakdown conditions. We do not use ordinary junction diode because the low power rating diode can get damaged when we apply reverse bias above its breakdown voltage. When the minimum input voltage and the maximum load current is applied, the Zener diode current should always be minimum. [resistance change thase voltage same rehse(100,150,200......1500)]