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Electrostatics/Electrodynamics

Electrodynamics

Electric Charges In Motion

Electric Circuit

Resistance

Conductance

Reciprocal Of Resistance

Temperature

Cross-sectional Area

Length

Material

Ohm = Resitance Of Column Of Mercury: 14.45g wt./106.3 cm ht.

Ohm's Law - I = V/R

R = Resistance In Ohms

V = Potential Difference In Volts

I = Current In Amperes

Property Of Circuit Which Hinders/Opposes Current Flow

Current

Ampere (Amp) = 1 Coulomb Charge Flowing Per Second

Amount Of Charge Flowing Per Second

Potential Difference

1 Volt = 1 Joule/Coulomb

EMF (Electromotive Force) = Maximum Difference Of Potential

Drives the Electrons

Electrostatics

Static Electricity

Laws

Only Negative Charges (Electrons) Can Move In Solid Conductors

Charges Concentrate On Point Of Greatest Surface Curvature

Charges Reside Only On External Surfaces Of Conductors

Force Between Charges

Coulomb's Law

D is distance in meters

Q is quantity in Coulombs

k is medium dependent constant

F = Force In Newtons

F = k([Q1 x Q2]/Dsq)

Directly Proportional To Product Of Their Quantities

Inversely Proportional To Square Of Distance Between Them

Unlike Charges Attract

Like Charges Repel

Electrification

Induction

Contact

Friction

Charges

Negative

Positive