JEE Main 2024PhysicsCurrent ElectricityEasyMCQ

JEE Main 2024 — Current Electricity Question with Solution

JEE Main 2024 (29 Jan Shift 1)

Question

A galvanometer having coil resistance 10 Ω shows a full scale deflection for a current of 3 mA. For it to measure a current of 8 A, the value of the shunt should be:

Choose an option

Show full solutionCorrect option: C
Correct answer
C3.75×10-3Ω

Step-by-step explanation

Given G=10 Ω, Ig=3 mA and I=8 A.

Let's consider the following figure:

From the figure, we have

IgG=I-IgS⇒S=IgGI-Ig⇒S=3×10-3108-0.003=3.75×10-3 Ω

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About this question

This is a previous-year question from JEE Main 2024, 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.