# 6.2 - Electric Fields
## Definitions and Core Info
An electric field is a region around a body in which other charged bodies will feel a force. The direction of the field is the direction of the force experienced by a positive test charge.
[](https://bookstack.asadhussain.net/uploads/images/gallery/2026-01/sPyimage.png)
... where F is the size of the electrical force, Q is the size of the charge, epsilon 0 is the permittivity of free space, and r is the distance between the charged point and any point in the field.
## Electric Field Lines
Radial field vs uniform field[1](https://www.schoolphysics.co.uk/age16-19/Electricity%20and%20magnetism/Electrostatics/text/Electric_fields/index.html):
[](https://bookstack.asadhussain.net/uploads/images/gallery/2026-01/fVfimage.png)
The spacing between field lines represents the strength of the field.
The field between different types of charged surface[1](https://www.schoolphysics.co.uk/age16-19/Electricity%20and%20magnetism/Electrostatics/text/Electric_fields/index.html):
[](https://bookstack.asadhussain.net/uploads/images/gallery/2026-01/1xLimage.png)
The neutral point is between two like-charged particles, showing where no electric force is experienced.
## Coulomb's Law
[](https://bookstack.asadhussain.net/uploads/images/gallery/2026-01/wl9image.png)
... where Q and q are the charges of two charged points, epsilon 0 is the permittivity of free space, and r is the shortest distance between these charged points.