For the given circuit (shown in part (A)) the time dependent input… | JEE Main 2026 (2 Apr, Shift 1)

Q22JEE Main 2026 · 2 APR · SHIFT 1Difficult

P-N Junction Diode

For the given circuit (shown in part (A)) the time dependent input voltage $v_{in}(t)$ and corresponding output $v_{o}(t)$ are shown in part (B) and part (C), respectively. Identify the components that are used in the circuit between points X and Y.

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Answer: (b)

The given branch (ideal diode + Zener, cathodes joined) conducts only when the top line is positive: diode forward, Zener in breakdown, so it clips the output at $+5$ V.
For the negative half it is blocked, so another branch between X and Y is needed to clip at $-5$ V.
This branch must be the same pair reversed: ideal diode and Zener joined anode to anode, with no resistor (a series resistor would stop the flat clipping).
Then in the negative half the Zener breaks down at 5 V and the ideal diode conducts, giving $v_o = -5$ V. So the answer is (b).

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