A proton moves a distance d in a uniform electric field 
as shown in the figure. Does the electric field do a positive or negative work on the proton? Does the electric potential energy of the proton increase or decrease?
Text Solution
Verified by ExpertsThe correct answer is:
A
+ve charge moves in the direction of field, but here it is moved opposite to the field,
work is to be done by external source.
W electric = – ve, Potential energy increase.
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