Question: Three point charges are positioned in the x-y plane as follows: 5 nC at y = 5 cm, 10 nC at y = 5 cm,

Three point charges are positioned in the x-y plane as follows: 5 nC at y = 5 cm, −10 nC at y = −5 cm, and 15 nC at x = −5 cm. Find the required x-y coordinates of a 20-nC fourth charge that will produce a zero electric field at the origin.

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