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Question: Answered & Verified by Expert
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
PhysicsElectrostaticsJEE Main
Options:
  • A
    $Q / 2$
  • B
    $-Q / 2$
  • C
    $\mathrm{Q} / 4$
  • D
    $-Q / 4$
Solution:
2240 Upvotes Verified Answer
The correct answer is:
$-Q / 4$
Apply the condition for equilibrium of each charge

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