Question

What is the work done in moving a charge of 0.4 C across two points having a potential difference of 8 V?

• A. 0.2 J
• B. 1.2 J
• C. 3.2 J
• D. 0.4 J

Answer 1

The correct option is C 3.2 J

The potential difference ($V$) between two points is the amount of work done ($W$) in moving a unit positive electric charge($q$) from one point to another in a current carrying conductor.
$\Rightarrow$ $V=\frac{W}{q}$
$\Rightarrow W=V\times q$
Given: $q=0.4C$
$V=8V$
Therefore, the work done in moving the charge $=8V\times 0.4C=3.2J$