JEE Main 2020 — Current Electricity Question with Solution
From: JEE Main 2020 (Online) 8th January Evening Slot
Question
The series combination of two batteries, both
of the same emf 10 V, but different internal
resistance of 20 and 5, is connected to the
parallel combination of two resistors 30 and
R . The voltage difference across the battery
of internal resistance 20 is zero, the value of
R (in ) is : _______
Enter your answer
Show full solutionCorrect answer: 30
Correct answer
30
Step-by-step explanation
10 – I × 20 = 0
I = 0.5A
Also,
I =
=
40 = 25 +
15 =
30 + R = 2R
R = 30
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This is a previous-year question from JEE Main 2020, 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.