Two Zener diodes ( A and B ) having breakdown voltages of 6   V and 4   V respectively, are…

Two Zener diodes (A and B) having breakdown voltages of 6 V and  4 V respectively, are connected as shown in the circuit below. The output voltage V0 variation with input voltage linearly increasing with time, is given by (Vinput = 0V at t = 0)

Solution

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

Asked in: JEE Main 2020 (05 Sep Shift 2)

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