# Electric field question

1. Oct 29, 2007

### Idea04

1. The problem statement, all variables and given/known data
With the earth's electric field the strength of the field at the earth's surface is 100 V/m.
Now I think that means 100 volts per vertical meter height. My question is what is the strength of the earth's electric field per meter^2 on horizontal earth's surface?

2. Relevant equations

3. The attempt at a solution

2. Oct 29, 2007

### Dick

The units of electric field are V/m, not V/m^2. That doesn't make much sense.

3. Oct 30, 2007

### Idea04

Sorry, I should probably reword my question. The earth has an electric charge and is being recharged by lightning strikes through out the world. And I read that the earth is constantly transfering electric charges into the atmosphere. My question is in one square meter of earth's surface how much electric charge or energy flows by that point on average.

4. Oct 30, 2007

### Dick

Ok. Then you want the surface charge density (coulombs/m^2). Use Gauss's theorem.