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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 25 July 2022, Shift 2, Physics Q36

Question 36 of 90 in this shift, Physics question 6 of 30, Section A.

Capacitance of an isolated conducting sphere of radius R1\mathbf{R_1} becomes n times when it is enclosed by a concentric conducting sphere of radius R2\mathbf{R_2} connected to earth. The ratio of their radii (R2R1)\left(\frac{R_2}{R_1}\right) is :
  1. (1)nn−1\frac{n}{n-1}Official answer
  2. (2)2n2n+1\frac{2n}{2n+1}
  3. (3)n+1n\frac{n+1}{n}
  4. (4)2n+1n\frac{2n+1}{n}

Official answer

Option 1

NTA final key.

Chapter
Electrostatic Potential and Capacitance
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.