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Find the potential due to a charged ring of density 2 units with radius 2m and the point at which potential is measured is at a distance of 1m from the ring.

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Find the potential due to a charged ring of density 2 units with radius 2m and the point at which potential is measured is at a distance of 1m from the ring.

(a) 18π

(b) 24π

(c) 36π

(d) 72π

This question was posed to me in homework.

Asked question is from Gauss Law topic in division Electrostatic Fields of Electromagnetic Theory

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The correct choice is (d) 72π

To explain I would say: The potential due to a charged ring is given by λa/2εr, where a = 2m and r = 1m. We get V = 72π volts.

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