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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A very long uniformly charged cylinder (radius R) has a surface charge density σ . A very long uniformaly charged line charge( linear charge density λ) is placed along the cylinder axis. If electric field intensity vector outside the cylinder is zero then :

A very long uniformly charged cylinder (radius R) has a surface charge density σ . A very long uniformaly charged line charge( linear charge density λ) is placed along the cylinder axis. If electric field intensity vector outside the cylinder is zero then :

Two concentric conducting thin spherical shells A and B having radii rA and rB ( rB > rA 0 are charged to Qa and -Qb (QB >QA) . The electrical field along a line (passing through the centre ) is