JEE Main 2021PhysicsSemiconductorsMediumNumerical

JEE Main 2021 — Semiconductors Question with Solution

JEE Main 2021 (16 Mar Shift 1)

Question

The value of power dissipated across the zener diode Vz=15 V connected in the circuit as shown in the figure is x×10-1 W.

The value of x to the nearest integer is _______.

Enter your answer

Show full solutionCorrect answer: 5
Correct answer
5

Step-by-step explanation

Voltage across RS=22-15=7 V

Current through RS=I=735=15 A

Current through  90Ω=I2=1590=16 A

Current through zener =15-16=130 A

Power through zener diode

P=VI

P=15×130=0.5 watt

P=5×10-1 watt

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About this question

This is a previous-year question from JEE Main 2021, covering the Semiconductors chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.