Question

Calculate potential at the centre of a ring due to charge Q uniformly
distributed along the ring of radius R and r is the axial distance from the
centre.
a) V=10
19
41TE, R
b) V=
4περτ
c) V=
41TE, R+r
d) Zero
71369-9370551
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Answer 1

Answer:

(a)

is right answer please check my answer.