Question

If a unit positive charge is taken from one point to another over an equipotential surface, then work done on the charge is

​​​​​​​$[$1 Mark$]$

• A. Positive
• B. Negative
• C. Zero
• D. Constant

Answer 1

The correct option is C Zero

Work done in moving a charge $q,W=q\Delta V$
Where $\Delta V$ is the potential difference between initial and the final point.
Since the potential at each point of an equipotential surface is the same, the potential does not change while we move a unit positive charge from one point to another as $\Delta V=0$ , Work done in the process is also zero

$\therefore$ option (c) is correct