A) Negative, increase
B) Positive, decrease
C) Negative, decrease
D) Positive, increase
Correct Answer: A
Solution :
Since, the proton is moving against the direction of electric field, so work is done by the proton against electric field. It implies that electric field does negative work on the photon. Again, proton is moving in electric field from low potential region to high potential region hence, its potential energy increases.
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