Charges are placed at the vertices of square as shown in diagram. If charge at A and B are interchanged with C and D respectively then-
Text Solution
Verified by ExpertsThe correct answer is:
C
Electric field E due to a single charge Q is given by
Net electric field 
due to all the charges at the center O is shown by in the following figure.
We can see that on interchanging the charges at A and B with charges C and D, there is no change on the magnitude, but its direction changes.
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