ElectrostaticsMedium
Question
Figure shows two large cylindrical shells having uniform linear charge densities +λ and −λ. Radius of inner cylinder is ′a′ and that of outer cylinder is ′b′. A charged particle of mass m, charge q revolves in a circle of radius r. Then, its speed ′v′ is : (Neglect gravity and assume the radii of both the cylinders to be very small in comparison to their length.)


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Solution

Using Gauss′s law for Gaussian surface shown in figure.
For circular motion.
qE =
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