The figures below depict two situations in which two infinitely long static line charges of constant positive line charge density $\lambda$ are kept parallel to each other. In their resulting electric field, point charges $q$ and $- q$ are kept in equilibrium between them. The point charges are confined to move in the $x$ direction only. If they are given a small displacement about their equilibrium positions, then the correct statement$(s)$ is(are)
The figures below depict two situations in which two infinitely long static line charges of constant positive line charge density $\lambda$ are kept parallel to each other. In their resulting electric field, point charges $q$ and $- q$ are kept in equilibrium between them. The point charges are confined to move in the $x$ direction only. If they are given a small displacement about their equilibrium positions, then the correct statement$(s)$ is(are)
- [IIT 2015]
- A
Both charges execute simple harmonic motion.
- B
Both charges will continue moving in the direction of their displacement.
- C
Charge $+ q$ executes simple harmonic motion while charge $- q$ continues moving in the direction of its displacement.
- D
Charge $- q$ executes simple harmonic motion while charge $+ q$ continues moving in the direction of its displacement.
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