JEE · NEET Previous Year 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:

Topic: NEET PYQ

Answer: D. Full step-by-step solution below.

  1. A+Q/2
  2. B+Q/4
  3. C–Q/2
  4. D–Q/4

Correct answer: D

Solution

(d) = 0
Þ 4q + Q = 0
Þ q = –

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