Question

$\bf{Question}$ Charges are placed on the vertices of a square as shown in the figure (attached) . Let E be the electric field and V
the potential at the centre of the square. If the charges on A and B are interchanged with those on D and
C respectively, then

(a) E remains unchanged but V will change


(b) both E and V will change


(c) E and V will remain unchanged


(d) V remains unchanged but E will change
​

Answer 1

Answer : Option A

Solution :

As shown in the figure, the resultant electric fields before and after interchanging the charges will have the same magnitude, but opposite directions. Also, the potential will be same in both cases at it is a scalar quantity.

Answer 2

Explanation:

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