Question

In Zener diode, for currents greater than the knee current, the v-i curve is almost

• A. Almost a straight line parallel to y-axis
• B. Almost a straight line parallel to x-axis
• C. Equally inclined to both the axes with a positive slope
• D. Equally inclined to both the axes with a negative slope

Hint:

In the Zener breakdown region, the voltage across the Zener diode remains nearly constant, and the V-I curve becomes flat and parallel to the x-axis.

Answer 1

The Correct Option is B

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).