Question

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

• A. $\vec{E}$ remains unchanged, $V$ changes
• B. Both $\vec{E}$ and $V$ change
• C. $\vec{E}$ and $V$ remains unchanged
• D. $\vec{E}$ changes, $V$ remains unchanged

Answer 1

Answer: (D)

$\vec{E}$ changes, $V$ remains unchanged

Answer 2

As $\vec{E}$ is a vector quantity