Question

Three charges +Q, q, +Q are placed respectively, at distance, 0, d/2 and d from the origin, on the x-axis. If the net force experienced by +Q, placed at x = 0, is zero, then value of q is
(A) –Q/4 (B) +Q/2
(C) +Q/4 (D) –Q/2
[JEE Main 2019]

Answer 1

Question :

Three charges +Q, q, +Q are placed respectively, at distance, 0, d/2 and d from the origin, on the x-axis. If the net force experienced by +Q, placed at x = 0, is zero, then value of q is

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correct option a) -Q/4

see step by step explanation in attachment