GATE EC 2015 Set 1 — Question 22
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Analog Circuits → Diode Circuits → Zener Regulators
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Question
In the circuit shown below, the Zener diode is ideal and the Zener voltage is . The output voltage (in volts) is ______.

Correct answer
5 to 5
Solution
1.First, assume the Zener diode is an open circuit to find the voltage across it ().
2.Using the voltage divider rule: .
3.The Zener voltage is given as .
4.Since the calculated voltage is less than the Zener breakdown voltage , the Zener diode remains in the OFF state (non-conducting).
5.Therefore, the output voltage is simply the voltage across the load resistor, which is .
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