JEE Main 2021PhysicsCurrent ElectricityKirchhoffs Circuit LawsmediumNumerical

JEE Main 2021 — Current Electricity Question with Solution

From: JEE Main 2021 (Online) 22th July Evening Shift

Question

In an electric circuit, a cell of certain emf provides a potential difference of 1.25 V across a load resistance of 5. However, it provides a potential difference of 1 V across a load resistance of 2. The emf of the cell is given by . Then the value of x is ______________.

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Show full solutionCorrect answer: 15
Correct answer
15

Step-by-step explanation

JEE Main 2021 (Online) 22th July Evening Shift Physics - Current Electricity Question 194 English Explanation

In case (a)

..... (1)

In case (b),

..... (2)

From equation (1) & (2)



or x = 15

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About this question

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.