Questions
A conducting sphere of radius 10 cm is charged with 10 μC. Another uncharged sphere of radius 20 cm is allowed to touch it for some time. After that if the spheres are separated, then surface density of charges on the spheres will be in the ratio of
detailed solution
Correct option is C
After redistribution, new charges on spheres areQ1'=1010+20×10=103μC and Q2'=2010+20×10=203μCRatio of charge densities, σ1σ2=Q1'Q2'×r22r12 =10/320/3×20102=21 σ=Q4πr2Talk to our academic expert!
Similar Questions
Two spherical shells are as shown in figure.
Let r be the distance of a point from their common centre. Then, match the following columns and mark the correct choice from the given codes.
Column-I | Column-II | ||
i. | Electric field for r < R1 | p. | is constant for q2 and vary for q1 |
ii. | Electric potential for r < R1 | q. | is zero for q2 and vary for q1 |
iii. | Electric potential for R1 < r <R2 | r. | is constant |
iv. | Electric field for R1 < r <R2 | s. | is zero |
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