Two positively charged particles $X$ and $Y$ are initially far away from each other and at rest. $X$ begins to move towards $Y$ with some initial velocity. The total momentum and energy of the system are $p$ and $E$.
Diffcult
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We know that electrostatic force is conservative. So the mechanical energy remains conserve when the external force is acting. Therefore, momentum is not conserve.
So $(B)$ is the right option.
So $(B)$ is the right option.
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