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JEE Main 2013 Physics question

PhysicsElectric Charges and FieldsJEE Main 2013

Two balls of same mass and carrying equal charge are hung from a fixed support of length l. At electrostatic equilibrium, assuming that angles made by each thread is small, the separation, x between the balls is proportional to :

Answer: (4)

Solution

For small angles, $θ ≈ = =

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Question ID VK-103909