JEE Main 2021 — Current Electricity Question with Solution
From: JEE Main 2021 (Online) 26th August Evening Shift
Question
An electric bulb of 500 watt at 100 volt is used in a circuit having a 200 V supply. Calculate the resistance R to be connected in series with the bulb so that the power delivered by the bulb is 500 W.
Choose an option
Show full solutionCorrect option: A
Correct answer
A20
Step-by-step explanation
500 watt at 100 v
P = Vi
500 = Vi
i = 5 Amp
V = i R
R = 20
P = Vi
500 = Vi
i = 5 Amp
V = i R
R = 20
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This is a previous-year question from JEE Main 2021, covering the Current Electricity 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.