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...