Question 82 of 209

Two Zener diodes ($A$ and $B$) having breakdown voltages of $6V$ and $4V$ respectively, are connected as shown in the circuit below. The output voltage ${V}_{0}$ variation with input voltage linearly increasing with time, is given by (${V}_{input}=0Vatt=0$)

ABCD

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Answer: (C)

At time $t=0,$ voltage across the first zener diode is increases linearly till it reaches it's breakdown voltage of $4V$, after that voltage increases linearly till it reaches the breakdown voltage of second zener diode,
As soon as voltage across the zener diode reaches the breakdown voltage of $6V$ of second zener diode, volatge becomes constant and doesn't change with time.