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A uniformly charged thin spherical shell of radius R carries uniform surface charge density of $\sigma$ per unit area. It is made of two hemispherical shells, held together by pressing them with force F (see figure). F is proportional to

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1 Answer

$(A)\; \large\frac{1}{\in_0} \sigma^2 R^2$
Hence A is the correct answer.
answered Jun 6, 2014 by meena.p

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