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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumConceptual

JEE Main 25 June 2022, Shift 1, Physics Q50

Question 50 of 90 in this shift, Physics question 20 of 30, Section A.

A teacher in his physics laboratory allotted an experiment to determine the resistance (G) of a galvanometer. Students took the observations for 13\frac{1}{3} deflection in the galvanometer. Which of the below is true for measuring value of G ?
  1. (1)13\frac{1}{3} deflection method cannot be used for determining the resistance of the galvanometer.
  2. (2)13\frac{1}{3} deflection method can be used and in this case the G equals to twice the value of shunt resistance(s).Official answer
  3. (3)13\frac{1}{3} deflection method can be used and in this case, the G equals to three times the value of shunt resistance(s).
  4. (4)13\frac{1}{3} deflection method can be used and in this case the G value equals to the shunt resistance(s).

Official answer

Option 2

NTA final key.

Chapter
Moving Charges and Magnetism
Topic
Wheatstone Bridge
Idea tested
Kelvin's Method for Galvanometer Resistance

Same topic in other shifts

All Wheatstone Bridge questions
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  3. 5 Apr 2024, Shift 2 · Q46A galvanometer of resistance 100 Ω100\ \Omega when connected in series with 400 Ω400\ \Omega measures a voltage of upto 10 V. The value of…MediumSingle correct
  4. 6 Apr 2024, Shift 1 · Q40The value of unknown resistance (xx) for which the potential difference between BB and DD will be zero in the arrangement shown, is :MediumSingle correctHas a figure
  5. 9 Apr 2024, Shift 1 · Q50A galvanometer has a coil of resistance 200 Ω200\ \Omega with a full scale deflection at 20 μ20\ \muA. The value of resistance to be added to…EasySingle correct
  6. 1 Feb 2024, Shift 2 · Q50In a metre-bridge when a resistance in the left gap is 2 Ω2\,\Omega and unknown resistance in the right gap, the balance length is found to…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.