Applications Of Diode

Step 1: Understand the Zener diode behavior.
In a Zener diode, once the voltage exceeds the knee voltage (Zener breakdown region), the diode conducts current in reverse without significant increase in voltage.
The V-I characteristic in this region becomes almost flat and parallel to the x-axis.
Step 2: Identify the correct characteristic.
For currents greater than the knee current, the voltage across the Zener diode remains almost constant, resulting in a V-I curve that is nearly flat (parallel to the x-axis).