A circular disk of radius r and total charge q has the
A circular disk of radius R and total charge Q has the charge distributed with surface charge density η=cr , where c is a constant.
Obtain the expression for the electric potential at distance z on the axis of the disk.
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a mass sitting on a horizontal frictionless surface is attached to one end of a spring the other end is fixed to a wall
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a circular disk of radius r and total charge q has the charge distributed with surface charge density etacr where c is
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