Question: A 2.75-C charge is uniformly distributed on a ring of radius 8.5 cm. Find the electric field on the axis at (a) 1.2 cm, (b)

A 2.75-μC charge is uniformly distributed on a ring of radius 8.5 cm. Find the electric field on the axis at

(a) 1.2 cm,

(b) 3.6 cm, and

(c) 4.0 m from the center of the ring

(d) Find the field at 4.0 m using the approximation that the ring is a point charge at the origin, and compare your results with that for part (c).

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