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Particel A having positive charfes is mo...

Particel `A` having positive charfes is moving directly head -on to wards initially statinary positively charged particel ` B`. At the instant when `A` and `B` are closest together .

A

the momenta of A and B must be equal

B

the velocities of A and B must be equal

C

B would have gained less kinetic energy than A would have lost

D

B would have gained the same momentum as A would have lost

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The correct Answer is:
B, C, D
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