# Verification of electric potential

1. Mar 30, 2013

### ehabmozart

Electric Potential at a point is defined as the "work done by the electric field on a charged particle as that particle moves in from infinity to point f"... My question now, is where does this electric field point. Consider a positive charge and we want to get the sign of V nearby. I know before evaluating that it should be positive. This can be verified by the equation of V=kq/r and since q is positive, V is positive. But how can I verify this using the definition. Where is the electric field and what is the unit charge??

2. Mar 30, 2013

### Staff: Mentor

The definition of the direction of an electric field is arbitrary - it was defined to point away from positive charges, and this is reflected in the formula for the potential.