Question

The __________ across a Zener diode remains constant.

Answer 1

Explanation

1. Zener diode has the property of behaving like DC battery in “on” state.
2. If the Zener diode is shunted across the load $R_L$ and the voltage across Zener diode is more than the Zener voltage $V_Z$ then the Zener diode is in $\mathrm{ON}$ state.
3. Any variation in voltage across the Zener diode will not change the output voltage within the operational limit.
4. So within the operational limit Zener diode maintains a constant voltage.

Hence, the voltage across a Zener diode remains constant.