Figure 1. A ring of radius R and charge +Q lies in the x,y-plane. Point P...

Figure 1. A ring of radius R and charge +Q lies in the x,y-plane. Point P is distance a from the centre of the ring.

Consider a thin ring (width dr) with radius r that contains a total charge Q uniformly distributed along the ring. A point P is a distance a above the centre of the ring as shown in this figure. In this question, use ϵ0 rather than Coulomb's constant in your expressions. The potential an infinite distance from a point charge is 0, (V∞=0).

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genius_generous answered 2 years ago

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