JEE Main 2023 · PhysicsMultiple choiceDiagram basedMediumCalculation

JEE Main 10 April 2023, Shift 1, Physics Q43

Question 43 of 90 in this shift, Physics question 13 of 30, Section A.

A zener diode of power rating 1.6 W is to be used as voltage regulator. If the zener diode has a breakdown of 8 V and it has to regulate voltage fluctuating between 3 V and 10 V. The value of resistance

R_s

for safe operation of diode will be

The figure, in words

Zener voltage-regulator circuit: series resistor R_s in the top wire from the 'Unregulated Voltage' input to the output; a zener diode connected across the output between top and bottom wires; 'Regulated Voltage' output terminals on the right.

(1) $10\,\Omega$ Official answer
(2) $12\,\Omega$
(3) $13\,\Omega$
(4) $13.3\,\Omega$

Official answer

Option 1

NTA final key.

Chapter: Semiconductor Electronics: Materials, Devices and Simple Circuits
Topic: Semiconductor Diodes
Idea tested: Zener Diode Power Dissipation Limits

Same idea in other shifts

Asked 5× in all

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.