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This article summarizes equations in the theory of
electromagnetism In physics, electromagnetism is an interaction that occurs between particles with electric charge. It is the second-strongest of the four fundamental interactions, after the strong force, and it is the dominant force in the interactions of ...
.


Definitions

Here subscripts ''e'' and ''m'' are used to differ between
electric Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by ...
and
magnetic charge In particle physics, a magnetic monopole is a hypothetical elementary particle that is an isolated magnet with only one magnetic pole (a north pole without a south pole or vice versa). A magnetic monopole would have a net north or south "magneti ...
s. The definitions for monopoles are of theoretical interest, although real magnetic dipoles can be described using pole strengths. There are two possible units for monopole strength, Wb (Weber) and A m (Ampere metre). Dimensional analysis shows that magnetic charges relate by ''qm''(Wb) = ''μ''0 ''qm''(Am).


Initial quantities


Electric quantities

Contrary to the strong analogy between (classical)
gravitation In physics, gravity () is a fundamental interaction which causes mutual attraction between all things with mass or energy. Gravity is, by far, the weakest of the four fundamental interactions, approximately 1038 times weaker than the stron ...
and electrostatics, there are no "centre of charge" or "centre of electrostatic attraction" analogues. Electric transport Electric fields


Magnetic quantities

Magnetic transport Magnetic fields


Electric circuits

DC circuits, general definitions AC circuits


Magnetic circuits


Electromagnetism


Electric fields

General Classical Equations


Magnetic fields and moments

General classical equations


Electric circuits and electronics

Below ''N'' = number of conductors or circuit components. Subcript ''net'' refers to the equivalent and resultant property value.


See also

*
Defining equation (physical chemistry) In physical chemistry, there are numerous quantities associated with chemical compounds and reactions; notably in terms of ''amounts'' of substance, ''activity'' or ''concentration'' of a substance, and the ''rate'' of reaction. This article use ...
*
Fresnel equations The Fresnel equations (or Fresnel coefficients) describe the reflection and transmission of light (or electromagnetic radiation in general) when incident on an interface between different optical media. They were deduced by Augustin-Jean Fres ...
*
List of equations in classical mechanics Classical mechanics is the branch of physics used to describe the motion of macroscopic objects. It is the most familiar of the theories of physics. The concepts it covers, such as mass, acceleration, and force, are commonly used and known. The sub ...
*
List of equations in fluid mechanics This article summarizes equations in the theory of fluid mechanics. Definitions Here \mathbf \,\! is a unit vector in the direction of the flow/current/flux. Equations See also * Defining equation (physical chemistry) *List of electro ...
*
List of equations in gravitation This article summarizes equations in the theory of gravitation. Definitions Gravitational mass and inertia A common misconception occurs between centre of mass and centre of gravity. They are defined in similar ways but are not exactly the ...
*
List of equations in nuclear and particle physics This article summarizes equations in the theory of nuclear physics and particle physics. Definitions Equations Nuclear structure Nuclear decay Nuclear scattering theory The following apply for the nuclear reaction: :''a'' + ''b'' ↠...
*
List of equations in quantum mechanics This article summarizes equations in the theory of quantum mechanics. Wavefunctions A fundamental physical constant occurring in quantum mechanics is the Planck constant, ''h''. A common abbreviation is , also known as the ''reduced Planck cons ...
*
List of equations in wave theory This article summarizes equations in the theory of waves. Definitions General fundamental quantities A wave can be longitudinal where the oscillations are parallel (or antiparallel) to the propagation direction, or transverse where the oscill ...
* List of photonics equations *
List of relativistic equations Following is a list of the frequently occurring equations in the theory of special relativity. Postulates of Special Relativity To derive the equations of special relativity, one must start with two other #The laws of physics are invariant ...
* SI electromagnetism units *
Table of thermodynamic equations This article is a summary of common equations and quantities in thermodynamics (see thermodynamic equations for more elaboration). Definitions Many of the definitions below are also used in the thermodynamics of chemical reactions. General ...


Footnotes


Sources

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Further reading

* * * * {{SI units navbox Physical quantities SI units Equations of physics Electromagnetism