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JEE Advanced 2015 Paper 1

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Question : 14

Total: 60

The figure below depict two situations in which infinitely long static line charges of positive line charge density λ are kept parallel to each other.In their resulting electric field,point charge qand−q are kept in equilibrium between them.The point charges are confused to move in the x-direction only.If they are given a small displacement about their equilibrium position,then the correct statements(s) is (are )

Both charges execute simple harmonic motion.
Both charges will continue moving in the direction of their distance
Charge +q executes simple harmonic motion while charge −q continues movies in the direction of its displacements
Charge−qexecutes simple harmonic motion while charge +q continues movies in the direction of its displacements

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