JEE Main 2019 — Current Electricity Question with Solution
From: JEE Main 2019 (Online) 11th January Morning Slot
Question
Two equal resistances when connected in series to a battery, consume electric power of 60 W. If these resistances are now connected in parallel combination to the same battery, the electric power consumed will be :
Choose an option
Show full solutionCorrect option: A
Correct answer
A240 W
Step-by-step explanation
In series condition, equivalent resistance is 2R
thus power consumed is 60W =
In parallel condition, equivalent resistance is R/2 thus new power is
P' =
or P' = 4P = 240W
thus power consumed is 60W =
In parallel condition, equivalent resistance is R/2 thus new power is
P' =
or P' = 4P = 240W
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This is a previous-year question from JEE Main 2019, 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.