1.

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`.

Answer» Correct Answer - B
IF Y is fixed i.e. another force is exist on Y additional to the mutual interaction between X & Y. So the net force on system (X & Y) is not zero p is charged but total always remain conserved.


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