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If a charge q is placed at the centre of the line joining two equal charges Q such that the system is in equilibrium then the value of q is

Options

  1. AQ / 2
  2. B-Q / 2
  3. CQ / 4
  4. D-Q / 4

Correct answer

D. -Q / 4

Step-by-step solution

Apply the condition for equilibrium of each charge

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