Physics - Semiconductors Question with Solution | TestHub

A Zener diode is a heavily doped p-n junction diode designed to operate in the reverse breakdown region.

In reverse bias, when the applied voltage reaches the Zener breakdown voltage, the voltage across the diode remains constant for a wide range of currents. This property allows it to be used as a voltage regulator.

In forward bias, a Zener diode behaves exactly like a standard p-n junction diode, allowing current to flow when the forward voltage exceeds the barrier potential.

Answer: It works as a voltage regulator in reverse bias and behaves like simple pn junction diode in forward bias.