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.

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

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

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

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If Y is fixed, neither E nor P is conserved.

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Solution

The correct options are
B If Y is fixed, E is conserved but not P.
C p and E are conserved if both X and Y are free to move.
Theory based question.
Hence, the answer is both A and C options.

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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.

The correct options are B If Y is fixed, E is conserved but not P. C p and E are conserved if both X and Y are free to move.Theory based question.Hence, the answer is both A and C options.

The correct options are
B If Y is fixed, E is conserved but not P.
C p and E are conserved if both X and Y are free to move.
Theory based question.
Hence, the answer is both A and C options.