Charges are placed on the vertices of a square as shown. Let 
be the electric field and V the potential at the center. If the charges on A and B are interchanged with those on D and C respectively, then
A
remains unchanged, V changes
B
Both 
and V change
and V change
C
and V remain unchanged
D
changes, V remains unchanged
Text Solution
Verified by ExpertsThe correct answer is:
D
In initial case, E is along whereas in final case E is along . Potential at center remains same.
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