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The Identical point charges,q each,are kept 2m apart in air.A third point charge  Q of unknown magnitude and sign is placed on the line joining the charges such that the system remains in equilibrium.Find the position and nature of Q

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According to the given question 

  • If we place a negative or positive charge of nay magnitude in the middle then the system will reach equilibrium. Because force applied by charge q on Q will cancel out each other.

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