# Question concerning a formula to calculate work

1. Apr 27, 2009

### haydn

I have the formula W=q$$\Delta$$V. Where $$\Delta$$V is the change in electric potential, and q is a charge. Say I wanted to move a point charge some distance in an electric field (created by another point charge) and calculate the work associated with this movement. Does the q in the above equation relate to the point charge I'm moving, or the one that is creating the electric field?

I know V for a point charge is kq/r, and I would use the charge of the point charge I'm moving there.

Thanks.

2. Apr 27, 2009

### Redbelly98

Staff Emeritus
q in the "W = q ΔV" equation refers to the charge being moved. V refers to the potential due to the other (non-moving) point charge.

3. Apr 27, 2009

### haydn

That makes sense. Thanks for the clarification.