(a) Two identical point charges _q are located on the
Chapter 15, Problem 15.84(choose chapter or problem)
(a) Two identical point charges _q are located on the y-axis at y _ _a and y _ _a. What is the electric fi eld along the x-axis at x _ b? (b) A circular ring of charge of radius a has a total positive charge Q distributed uniformly around it. The ring is in the x _ 0 plane with its center at the origin. What is the electric fi eld along the x-axis at x _ b due to the ring of charge? (Hint: Consider the charge Q to consist of many pairs of identical point charges positioned at the ends of diameters of the ring.)
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