### electric field

**(E)**
(electric force as distributed over a space)

An **electric field** (conventionally termed **E** in equations)
is the tendency at each point in space
to force an electrically-charged object in a particular direction,
per Coulomb's law.
Mathematically, it is a gradient, a function on the three
dimensions of space yielding a vector in a direction along the
line of the force (which pushes objects of the two polarities
in opposite directions along the line) with
a magnitude consisting of the amount of force applied to
an object at that point per unit mass and unit electric
charge of the object.
This field is the gradient of a mathematical field,
which is termed the field of **electric potential**.

Two possible mathematical fields describe such a physical field,
so by convention, the field is such that the vectors point in the
direction that a positively-charged object is pushed. (The other possible
mathematical field would just have all the vectors in exactly the
opposite direction, showing the direction that a negatively-charged object
would be pushed.)

An *electric field* is analogous to a gravitational field,
both following inverse square laws, but incorporates
the concept of electric charge with a polarity (positive and negative)
and that each polarity attracts the other polarity but repels objects
with the same polarity.

(*electromagnetism,electricity,physics*)
http://en.wikipedia.org/wiki/Electric_field

**Referenced by:**

CMB polarization

dielectric

electron screening

field lines

hydrodynamics

Lorentz force

magnetic dipole radiation

magnetic flux density (B)

mathematical field

Maxwell's equations

particle spectrometer

polarization modes

Poynting vector (S)

suprathermal

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