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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Eight point charge of charge q each are placed on the eight corners of a cube of side a. A solid neutral metallic sphere of radius a/3 is placed with its centre at the centre of the cube . As a result charges are induced on the sphere , which form certain pattern on its surface . What is the potential at the center of the sphere .

Eight point charge of charge q each are placed on the eight corners of a cube of side a. A solid neutral metallic sphere of radius a/3 is placed with its centre at the centre of the cube . As a result charges are induced on the sphere , which form certain pattern on its surface . What is the potential at the center of the sphere .

A point charge +Q is placed at point B at a distance 2R from the center O of an uncharged thin conducting shell of radius R as shown in figure. If VA be the potential at point A then which is at a radial distance of R/2 from the center of the shell