# Taking the vector E out of the Electric potential equation

1. Jun 10, 2008

### casanova2528

the Electric field depends on the distance between the electric source and the point of measurement. Why can you take E out of the integral V = E dot dr? After all, E can't be constant from infinity to r sub zero...right? Is the integral supposed to be an approximate value?

need some assistance.

2. Jun 10, 2008

### casanova2528

oh, I get it now....it was for a uniform field. never mind.