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Electrical Energy Fundamentals
chapter 2 Technical Terms
52
Physics
Graduate
02/22/2012

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Term
alternating current
Definition
a periodic current that contineously reverses directions
Term
amperage
Definition
the measurement of the rate of flow of electrons
Term
Amperor
Definition
the unit used in measuring amperage or current abbreviated amp ( plural amps) named after mary marie ampere
Term
Atom
Definition
The Smallest part of an element
Term
Protons
Definition
The Posotivley charged particles of an atom
Term
Electrons
Definition
Negativley charged Particals that orbit the Neclues of an Atom
Term
Free Electrons
Definition
Electrons that are loosley bonded to the Nucleus of an atom and can easly leave to join other Atoms
Term
Conductor
Definition
A substance that allows Electrons to flow freeley through it, an object having good conductivity
Term
Insulator
Definition
Substance prevents Electrons from moving freeley
Term
Current
Definition
The Flow of electrons
Term
Equilibrium
Definition
When two connected Bodies Have the same number of electrons, A balanced Condition
Term
Electrocal Potential
Definition
The ability to provide free electrons
Term
Direct Current
Definition
A current that allows flows in one direction
Term
Cycles
Definition
A Cycle is a complete repetition of a waive form or signal. the rate at witch a signal repeats itself is expressed in cycles per second, or Hert,s
Term
Hertz
Definition
A unit of Frequency that equals one cycle per second. Named after Heinrich hertz
Term
Anode
Definition
The Posotive terminal of a Battery
Term
Cathode
Definition
The Negative terminal of a Battery
Term
Battery
Definition
A Group of Voltiac cells that are connected in a series or parliel, Usually contained in one case
Term
Wet Cell
Definition
A Battery that uses a Liquid Electroite
Term
Dry Cell
Definition
A Battery that uses a chemical paste Electrolyte
Term
Electrolyte
Definition
The Chemical that is a Liquid or Paste that allows the flow of Electrons in a Battery
Term
Generator
Definition
A device that uses Electromagnetic Induction to convert Mechinacal Energy to electrical energy
Term
Electromotive force (EMF)
Definition
The force that causes current to flow between tow objects with different electrical potential
Term
Volt (V)
Definition
The unit of mesurment of Electromotive Force caused by the difference in Potential between two bodies Named after Allesandro Volta
Term
Resistance
Definition
The Opposition to the flow of electrons through a conductor
Term
Ohms
Definition
The units of measurement used to express resistance named after George Somon Ohm
Term
Power (P)
Definition
The rate of doing work. Electric power is measured in watts or Volt-Amperes
Term
Watts (W)
Definition
The units of measurement used in expressing power delevered to or consumed by an electrical device. Named after James Watt
Term
Voh-Amper (VA)
Definition
Very simply volt multplyed by amps the ammount of power an electrical system can provide or the amount of power an electrical device requires. Equivalent to watts in simple systems, Abbreviated as Volt-Amps
Term
Energy
Definition
The ability to do work
Term
Work
Definition
The process of changing energy from one form to another, Or causing an object to gain or lose energy.
Term
Joules
Definition
A unit of electrical power. One Joulie equals one watt-second Named after James Prescott Joulie
Term
Killowatt Hours (Kwh)
Definition
A Unit of electrical Power. One Killowatt-hour is the equivalent of 1,000 watts being used for a 1 hour period
Term
Circuit
Definition
The Pathway over which electrons can move
Term
Parallel Circuit
Definition
A circuit with Multiple paths available for current to flow
Term
Load
Definition
Device that converts electricity into another form of energy
Term
Ohm's Law
Definition
The law that states the relationship between Voltage, Resistance and current
Term
Watts Law
Definition
The law that states the relationship between Power, Voltage and current
Term
Complex circuit
Definition
A combination of series and parallel Circuits
Term
Electromagnetic Induction
Definition
The process of producing an Electromotive force by varying the magnetic field surrounding a conductor
Term
Left hand Rule
Definition
A rule for determining the direction of flow in a conductor caused by Electromagnetic Induction. Also known as Flemming' Rule
Term
Transformer
Definition
A Device that transforms electrical energy from one circuit to another, Usually at a different Voltage, through Electromagnetic Induction
Term
Windings
Definition
The coils of wire in an electrical device. Winding's are used in Generators, Motors and Transformers
Term
Primary Winding
Definition
The winding of a Transformer that creates a magnetic field and is connected to the power source side
Term
Secondary Winding
Definition
The Transformer winding connected to the Load
Term
Step-up Transformer
Definition
A Transformer that steps up, or Increases, Voltage exiting the Transformer.
Term
Step-down Transformer
Definition
A Transformer that steps down, or decreases, the voltage exiting the Transformer
Term
Substation
Definition
A collection of Transformers that changes the voltage of the Electrical power and redistributes it along another set of conductors
Term
Basic Power Formula
Definition
Watts, I is current measured in Amps, and E is measured in Volts
Term
Branch
Definition
A Alternating routes in a circuit
Term
Electrolyte
Definition
The chemical that is liquid or paste allows the flow of electrons in a battery
Term
Neutrons
Definition
The particles with no charge in the Nucleus of an atom
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