Question

state the maximum value of reverse current for the given Zenger diode

Answer 1

The zener diode is Silicon crystal diode having a special reverse current characteristics. In zener diode as the reverse voltage applied on p-n junction is increased, a limit comes when the current increases abruptly from its cut off value and zener diode begins to behave almost like a conductor. This limiting voltage is called the "Zener Voltage' or "Breakdown voltage" and the resulting large current as 'Zener Current"
In mobile charger Zener diode is used :- First step is Step down transformer Which step down 200V to lower voltage then a rectifier circuit converts Ac to Dc then a Zener Diode which regulates the voltage to 5Volt so that a stable voltage provide to the battery. Watch above video to get more details (theoretical + experimental) part