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A charged particle X moves directly towa...

A charged particle X moves directly towards another charged particle Y. For the 'X plus Y' system, the total momentum is p and the total energy is E.

A

p and E are conserved if both X and Y are free to move

B

(a) is true only if X and Y have similar charges

C

If Y is fixed, E is conserved but not p

D

If Y is fixed, neither E nor p is conserved

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The correct Answer is:
A, C
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