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2. Electric Potential and Capacitance
easy
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 on $D$ and $C$ respectively, then
A
$\overrightarrow E$ remains unchanged, $V$ changes
B
Both $\overrightarrow E$ and $V$ change
C
$\overrightarrow E$ and $V$ remains unchanged
D
$\overrightarrow E$ changes, $V$ remains unchanged
Solution
$E$ changes because it is a vector quantity and $V$ is a scalar quantity, thus electric field changes and $V$ remains unchanged.
Standard 12
Physics
