# Homework Help: Work done on a charge by an electric field

1. Jan 31, 2010

### Juan Pablo

1. The problem statement, all variables and given/known data

Find the work done a charge "q" of mass "m" by an electric field of magnitude "E" when it's moved a distance "d"

2. The attempt at a solution

$$W = \int_A^B F_e \cdot dr = F_e \int_A^B dr = F_e d = qEd$$

I used the Lorentz force equation for electrostatics at the end. I'm not sure if I did it correctly. I never used the mass given but I'm pretty sure I don't need it.

2. Jan 31, 2010

### Redbelly98

Staff Emeritus
Looks good.

3. Feb 2, 2010

Thanks!