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Capacitor question

2022 · 25 Jul · Shift 2 · Q50
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  5. /2022 · 25 Jul · Shift 2 · Q50

Capacitor question

2022 · 25 Jul · Shift 2 · Q50

JEE MainPhysicsCapacitorMCQ+4 / −1
Capacitance of an isolated conducting sphere of radius R1 becomes n times when it is enclosed by a concentric conducting sphere of radius R2 connected to earth. The ratio of their radii (R2R1)\left( {{{{R_2}} \over {{R_1}}}} \right)(R1​R2​​) is :
  1. A
    nn−1{n \over {n - 1}}n−1n​
  2. B
    2n2n+1{{2n} \over {2n + 1}}2n+12n​
  3. C
    n+1n{{n + 1} \over n}nn+1​
  4. D
    2n+1n{{2n + 1} \over n}n2n+1​
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