How things work college course/Electricity and Field theory
For an introduction to the purpose and scope of this work see Talk:How_things_work_college_course/Electricity_and_Field_theory
Outline
edit Electricity
 Electricity is the motion of charged particles (usually electrons)
 Electrons have potential energy due to electric forces. Potential energy is associated with these forces, and the fact that energy is involved that makes electricity useful.
 To understand energy we we need to introduce the concept of fields.
 Fields
 Wind velocity and air temperature are defined on Earth's atmosphere.
 Three other important fields are electric potential, electric field, and magnetic field. The first two can be defined by analogy with gravity.
 There are two ways to visually represent vector fields: A spatial distribution of vectors, and field lines.
 The most common way to represent a scalar field is the use of contours.
 The gravitationa analogy (first of two analogies)
 F = mg like F=qE
 PE = Fd if force is uniform and parallel to displacement
 PE_{G} = m(gh) = mφ, where φ=gh is gravitational potential.
 PE = qEd = q(Ed), where V=Ed is gravitational potential (replace h=height by d=distance)
 Inverse square
 (advanced sum over sources)
 Electric fields are rarely uniform. Need examples
Links
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VectorField.svg

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Electrostatic induction.svg

VFPt ringcurrentNoLoop.svg

Nonsymmetrical_charge_field.jpg

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Field_lines.svg

Field_lines_parallel_plates.svg

VFPt capacitor.svg

Conformal power two.svg

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