JEE Main 2023PhysicsCurrent ElectricityMediumMCQ

JEE Main 2023 — Current Electricity Question with Solution

JEE Main 2023 (15 Apr Shift 1)

Question

For designing a voltmeter of range 50 V and an ammeter of range 10 mA using a galvanometer which has a coil of resistance 54 Ω showing a full scale deflection for 1 mA as in figure.

(A) for voltmeter R≈50 kΩ

(B) for ammeter r≈0.2 Ω

(C) for ammeter r≈6 Ω

(D) for voltmeter R≈5 kΩ

(E) for voltmeter R≈500 Ω

Choose the correct answer from the options given below:

Choose an option

Show full solutionCorrect option: A
Correct answer
AA and C

Step-by-step explanation

The resistance is given by 

R=VIg-G

⇒5010-3-54≈50 kΩ

For ammeter,

S=IgGI-Ig⇒S=10-3×54(10-1)×10-3=6 Ω

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About this question

This is a previous-year question from JEE Main 2023, 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.