A potential difference of $1\,\text{V}$ between two points means that
A$1\,\text{C}$ of charge gains $1\,\text{J}$ of energy when moved between the points
B$1\,\text{J}$ of charge moves in $1\,\text{s}$ between the points
C$1\,\text{A}$ of current flows through the conductor
D$1\,\text{W}$ of power is consumed between the points
Answer & Solution
Correct answer: A. $1\,\text{C}$ of charge gains $1\,\text{J}$ of energy when moved between the points
By definition, potential difference is $V=\dfrac{W}{Q}$. Thus $1\,\text{V}$ means $1\,\text{J}$ of work is done in transferring $1\,\text{C}$ of charge.
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