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abstract representation of E field
Field line model
Superposition
E tangent to field line
E greater where lines closer together
Coulomb Force
lines point away from + /towards -
interaction is independent of other charges
lines originate on + and terminate on -
http://prezi.com/sk5d9ciakqze/coulomb-force/
more than 2 charges
lines representing total E don't cross
allows solution of multicharge problems
standard fields to know
These are vector problems!
further abstraction of the complex abstract idea of a field
Newton's Laws
qualitative behavior
test charge in pocket:)
Newtonian Mechanics
electrons are mobile
Electric Field
in solids:
nuclei are not
Forces
Newton's Laws
electrons are mobile
in liquids:
ions are mobile but slow (massive)
Work/Energy
philosophic problem
basic charge ideas
Circular Motion
http://prezi.com/2ppfda7yld_e/basic-charge-ideas/
action at a distance
opposites attract
3rd grade rule:
Freebody Diagrams
likes repel
Momentum
All the tools you develop to understand and describe the Newtonian universe are embedded. Electromagnetism just provide some additional forces that may be present in a particular setting.
energy needed to assemble
work/energy
downhill
Electric Potential
equipotential maps
points of equal electric potential
analogous to topographic maps of gravitational equipotentials
perpendicular to E field