JEE Main 2020PhysicsCurrent ElectricityEasyMCQ

JEE Main 2020 — Current Electricity Question with Solution

JEE Main 2020 (08 Jan Shift 2)

Question

A galvanometer having a coil resistance 100 Ω gives a full scale deflection when a current of 1mA is passed through it. What is the value of the resistance which can convert this galvanometer into a voltmeter given full scale deflection for a potential difference of 10V?

Choose an option

Show full solutionCorrect option: D
Correct answer
D9.9 kΩ

Step-by-step explanation

Vg=igRg=0.1V
V=10V
R=RgVVg-1
=100×99=9.9KΩ

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About this question

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.