Parts of the Atom
Other Electrical Conductors
Silver, Brass, Aluminum
Glass, Rubber, Fiber
Ohm's Law: I = E/R
As electromotive force increases, current
As resistance increases, current decreases.
I = quantity of electrons moving through circuit measured in amperes.
E = electrical pressure in the circuit measured in voltage.
R = resistance in the circuit measured in ohms.
P = amount of work circuit is capable of providing measured in watts.
West Virginia Law
W = V x A
A = current measured in amperes.
V = electromotive force measured in voltage.
W = energy available measured in wattage.
Increasing amounts of pressure to same circuit, current increases.
Some components in series, others in parallel.
Types of Electromotive
Direct Current (DC)
Nickel Cadmium (Ni-Cad) Battery
Built-in charge level indicator
How Alternating Current (AC) Works
Construction of a Sine Wave
Turbine Cross Section Demonstrating Rotating Magnetic Fields
United States Alternating Current Standard
Three Phase 60 Cycles per Second
Three Phase Sine Wave
Why a ground wire?
Types of Wire Conductors
American Wire Gauges
16 Gauge Wire: 6 amps x 120 volts = 720 watts
14 Gauge Wire: 15 amps x 120 volts = 1,680 watts
12 Gauge Wire: 20 amps x 120 volts = 2,400 watts