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Question
What is the ratio of the charges of two conducting spheres of radii r1 and r2 which have equal surface charge density?
Options
`"r"_1^2/"r"_2^2`
`"r"_2^2/"r"_1^2`
`"r"_1/"r"_2`
`"r"_2/"r"_1`
MCQ
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Solution
`"r"_1^2/"r"_2^2`
Explanation:
` "Here," sigma_1 = sigma_2`
`therefore "q"_1/(4pi_1^2) = "q"_2/(4pi"r"_2^2) Rightarrow "q"_1/"q"_2 = "r"_1^2/"r"_2^2`
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