Question

Two charges Q1 and Q2 are given to two concentric metallic spherical shells of radii R and 2R respectively. The surface charge densities on the outer surfaces of the shells are equal. Determine the ratio of Q1 and Q2. *


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Answer 1

Surface charge density σ = constant

Q1 = 4 pi R^2 σ

Q2 = 4 pi (2R)^2 σ

Q1/Q2 = 1/4