Electric potential energy is given by the formula This result is obtained by integrating the force-distance graph because work done is equal to the area under the graph. Electric potential is the electric potential energy experienced per unit charge. Therefore, it...

# 6.2 Electric fields

## Uniform Electric FieldsUniform Electric Fields

The electric field strength of a uniform electric field is given by: Derivation: The units of electric field strength can therefore be given as This also yields some equations of capacitance: Where is the permittivity of free space and ε is the relative...

## Coulomb’s LawCoulomb’s Law

Coulomb’s law can be applied to any point charges. It is given by: Since , it follows that, for a point charge, the electric field strength is given by: Gravitational and electric fields show some similarities and differences: ...

## Point and Spherical ChargesPoint and Spherical Charges

Fields are regions in which an object will experience a force at a distance (non-contact force). An electric field is created by charged objects. A uniformly charged sphere can be modelled can be modelled as a point charge at its centre. Electric field lines map...