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Two positively charged particles X and ...

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`.

A

If `Y` is fixed, both `p` and `E` are conserved.

B

If Y is fixed, E is conserved, but not p.

C

If both are free to move ,`p` is conserved but not E .

D

If both are free, `E` is conserved , but not `p`.

Text Solution

Verified by Experts

The correct Answer is:
B
Since `Y` is fixed of reaction force on `Y` is external force therefore `P` will not conserved.
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