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GATE EC 2018 Set 1 — Question 36

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MCQ+2 / -0.67MediumZener RegulatorsDiode CircuitsAnalog Circuits

Analog Circuits → Diode Circuits → Zener Regulators

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Question

The circuit shown in the figure is used to provide regulated voltage (5 V) across the 1kΩ1\text{k}\Omega resistor. Assume that the Zener diode has a constant reverse breakdown voltage for a current range, starting from a minimum required Zener current, IZmin=2 mAI_{Z\text{min}} = 2\text{ mA} to its maximum allowable current. The input voltage VIV_I may vary by 5% from its nominal value of 6 V. The resistance of the diode in the breakdown region is negligible.
Zener diode regulator circuit with input voltage $V_I$, series resistor $R$, Zener diode with $V_Z = 5\text{V}$, and load resistor $1\text{k}\Omega$
The value of RR and the minimum required power dissipation rating of the diode, respectively, are
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