Electrostatics/Electrodynamics

Static Electricity

Charges

Positive

Negative

Like Charges Repel

Unlike Charges Attract

Electrification

Friction

Contact

Induction

Laws

Force Between Charges

Coulomb's Law

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

Directly Proportional To Product Of Their Quantities

Inversely Proportional To Square Of Distance Between Them

F = Force In Newtons

k is medium dependent constant

Q is quantity in Coulombs

D is distance in meters

Electric Charges In Motion

Electric Circuit

Potential Difference

Drives the Electrons

EMF (Electromotive Force) = Maximum Difference Of Potential

1 Volt = 1 Joule/Coulomb

Current

Amount Of Charge Flowing Per Second

Ampere (Amp) = 1 Coulomb Charge Flowing Per Second

Resistance

Property Of Circuit Which Hinders/Opposes Current Flow

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

Ohm's Law - I = V/R

I = Current In Amperes

V = Potential Difference In Volts

R = Resistance In Ohms

Conductance

Reciprocal Of Resistance

Material

Length

Cross-sectional Area

Temperature