http://umdberg.pbworks.com/w/page/50913084/Motivating%20simple%20electric%20models
For example if
If the length of the subject is
We will soon also have an area of charge density which has units of
Electric Field
Direction
Directed straight away in all directions, so it's 3-dimensional ( like bottle brush )
Readings discussed why this is true.
Magnitude
Notice that point charge falls of as