Question

Take the breakdown voltage of the Zener diode used in the given circuit as $6\text{V}$ for the input voltage shown in figure below, the time variation output voltage is-
(graphs drawn schematic and not to scale)

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

Here, the given two Zener diodes are in reversed polarity so if one is in forward bias the other will be in reverse bias and above $6\text{V}$ the reverse bias will be in conduction mode.

Hence, when $V_{in}>6V$ the output will be constant and when $V_{in}>6V$ it will follow the input voltage.

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(C\right)$ is the correct answer.