Question

The work done in bringing a unit positive charge from infinite distance to a point at distance x from a positive charge Q is W. Then the potential $\varphi$ at that point is:

• A. $\frac{WQ}{x}$
• B. $W$
• C. $\frac{W}{x}$
• D. $WQ$

Answer 1

The correct option is B $W$

• Electric potential at a point in an electric field is defined as the work done in bringing a unit positive charge from infinity to that point.

Or, $V=\frac{W}{q}$

• Since charge is of magnitude unity, Hence electric potential at that point will be equal to the workdone $\therefore \varphi =W$
• Option B is correct.