Charges are placed on the vertices of a square as shown. Let E→ be the electric field and V the potential at the centre. If the charges on A and B are interchanged with those D on D and C respectively, then

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Both E→and V change.

E→and V remain unchanged.

E→changes, V remains unchanged.

E→ remains unchanged, V changes.

answer is C.

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Detailed Solution

V remains unchanged. Because with the change in position of charges, distances AO→,BO,CO and DO remains same. The direction of E changes.

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