Chapter 3 Electrical Quantities and Ohm's Law/Blue book

Power

ability to do work; in an electric circuit , is generally measured in watts

British thermal unit (BTU)

amount of heat necessary to change the temperature of one pound of water one degree Fahrenheit

Horsepower

common measure of power in which the base is established at 550 foot-pounds per second; in electrical quantities, 746 watts equals one horsepower

Complete unit

electric circuit that exists from the more negative to the more positive voltage

Resistance

element of an electric circuit that can limit the flow of current by producing heat

Electromotive force (EMF)

force known as voltage that pushes the electrons through an electric circuit

Grounding conductor

generally the bare or green wire used to establish low resistance path to the ground

Volt

measure of EMF often described as electrical pressure

Amp

measure of electric current defined as one coulomb per second

Joule

metric measure of power similar to the English measure watt

Conventional current flow theory

older theory stating that electric current flows from the more positive source to the more negative source

Neutral conductor

part of an electric circuit that is generally grounded

Watt

power measurement that describes the amount of electrical energy converted to some other form

Coulomb

quantity measure of electrons that equals 6.25x10 (18 power) electrons

Ohm's law

set of mathematical formulas developed by the German scientist Georg S. Ohm

Electron theory

theory stating that electricity flows from the more negative power source to the more positive power source

Impedance

total current limiting effect in an electric circuit; measured in ohms

ohm

unit of measure used to describe the resistance to the flow of electric current