Question: A ring placed along y2 + z2 = 4, x = 0 carries a uniform charge of 5C/m. (a) Find D at P(3,0, 0). (b)

A ring placed along y2 + z2 = 4, x = 0 carries a uniform charge of 5µC/m.
(a) Find D at P(3,0, 0).
(b) If two identical point charges Q are placed at (0, – 3, 0) and (0, 3, 0) in addition to the ring, find the value of Q such that D = 0 at P.

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