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## Homework Statement

There is a charge q, at a distance d from an infinite conducting plane (z=0).

Determine the electrostatic potential drop between the z=0 and z=d.

## Homework Equations

Ohm's Law

DeltaV=-integral (E.dl)

## The Attempt at a Solution

I know how to do this problem, using J = sigma E, Ohm's law, model the situation with a charge -q at z=-d, find the electric field, then integrate over the line to find an expression for the potential function V(z). I know I can integrate this potential function over the line now to find the potential drop, using the boundary condition that V=0 on the conducting plane.

The one thing I don't understand is the units. If I have a potential in Volts, and I integrate over a line, how can it result in a potential drop? Wouldn't it be V m?

Thanks in advance