A conducting sphere of rading \( 10 \mathrm{~cm} \) is charged with \( 10 \mu \mathrm{C} \). Ano...

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A conducting sphere of rading \( 10 \mathrm{~cm} \) is charged with \( 10 \mu \mathrm{C} \). Another uncharged sphere of radius \( 20 \mathrm{~cm} \) 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
(A) \( 1: 4 \)
(B) \( 1: 3 \)
(C) \( 2: 1 \)
(D) \( 1=1 \)
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