Question

​All the charge in a ring of charge Q is the same distance r from a point P on the ring axis.

All the charge in a ring of charge Q is the same distance r from a point P on the ring axis.

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 a) Electric charge Q is distributed uniformly around a thin ring of radius a (Fig. 23.20). Find the potential at a point P on the ring axis at a distance x from the center of the ring.

 b) Find the electric field at P using the appropriate denotative relationships

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