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Topic: Electrical energy

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Quantity of electricity

Electricity

Electric field

Electricity generation

Potential energy

Electricity market

Power plant

Electric flux

Green electricity

Electromagnetic force

Electromagnetic field

Electric power transmission

Current (electricity)

Energy density

Electric power

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	Energy - Engineering - A Wikia wiki (Site not responding. Last check: 2007-11-04)
		Energy can be in several forms: mechanical potential—due to possible physical interactions with other objects (for example, gravitational potential energy); kinetic—contained in macroscopic motion; chemical—potential stored in chemical bonds between atoms; electrical—potential due to possible charge interactions; thermal—contained in the kinetic energy of individual molecules[[2]]; nuclear energy[[3]]—potential stored between constituents of atomic nucleus [[4]].
		In contrast to kinetic energy, which is the energy of a system due to its motion, or the internal motion of its particles, the potential energy of a system is the energy associated with the spatial configuration of its components and their interaction with each other.
		Internal energy is the kinetic energy associated with the motion of molecules, and the potential energy associated with the rotational, vibrational and electric energy of atoms within molecules.
	engineering.wikia.com /wiki/Energy (2598 words)

	Electrical energy - Wikipedia, the free encyclopedia
		Electrical energy is related to the position of an electric charge in an electric field.
		is the permittivity of the medium and E is the electric field vector.
		Electrical energy is the amount of work that can be done by electricity.
	en.wikipedia.org /wiki/Electrical_energy (436 words)

	Alternative energy source, electrical energy research, saves crude oil.
		The objective of the Dovada electrical energy research project is to harness a non-polluting alternative energy source of electrical energy for the benefit of all mankind.
		Electrical energy is described as being the result of motion of electrical particles, typically referred to as the motion of electrons.
		All atoms at so called rest, are already electrically active and in a state of high velocity cosmic motion, this high velocity cosmic motion is ignored by current quantum physics, as used in the atomic model, even though this high velocity cosmic motion is contributing to the atoms internal electrical properties and stabilty.
	www.dovada.com /research/energyproject.htm (816 words)

	Electricity - Wikipedia, the free encyclopedia
		Electric charge is a property of certain subatomic particles (e.g., electrons and protons) which interacts with electromagnetic fields and causes attractive and repulsive forces between them.
		Energy is defined as the ability to do work, and electrical energy is simply one of the many types of energy.
		Electric power is the rate at which electrical energy is produced or consumed, and is measured in watts (symbol is: W).
	en.wikipedia.org /wiki/Electricity (1579 words)

	What is Electricity?
		Electricity is a basic part of nature and it is one of our most widely used forms of energy.
		Electricity is a controllable and convenient form of energy used in the applications of heat, light and power.
		Hydropower, the source for almost 7% of U.S. electricity generation in 2005, is a process in which flowing water is used to spin a turbine connected to a generator.
	www.eia.doe.gov /kids/energyfacts/sources/electricity.html (2578 words)

	Electrical Energy
		Electrical energy is undoubtedly the primary source of energy consumption in any modern household.
		Electrical energy is converted to heat energy in the resistive "elements" of the stove.
		The alternating electric field is able to exert forces on the water molecule because it is polar and free to rotate.
	www.uvi.edu /Physics/SCI3xxWeb/Energy/ElectricalEnergy.html (2023 words)

	Nikola Tesla's "Apparatus for Transmitting Electrical Energy"
		To produce an electrical movement of the required magnitude it is desirable to charge the terminal as highly as possible, for while a great quantity of electricity may also be displaced by a large capacity charged to low pressure, there are disadvantages met with in many cases when the former is made too large.
		In apparatus for the transmission of electrical energy a circuit connected to ground and to an elevated terminal and having its outer conducting boundaries, which are subject to high tension, arranged in surfaces of large radii of curvature substantially as, and for the purpose described.
		As a means for transmItting electrical energy to a distance through the natural media a grounded resonant circuit, comprising, a part upon which oscillations are impressed and another for raising the tension, having its outer conducting boundaries on which a high tension charge accumulates arranged in surfaces of large radii of curvature, substantially as described.
	www.tfcbooks.com /patents/tower.htm (1043 words)

	Classroom Energy - All About Petroleum - What is energy? - American Petroleum Institute (API) (Site not responding. Last check: 2007-11-04)
		Electrical energy, associated with the movement of electrons.
		This heat energy is, in turn, captured in the form of steam and used to drive a turbine generator, creating kinetic energy.
		And, finally, this kinetic energy spins a magnetic field around a conductor, causing a current to flow-creating electrical energy.
	www.classroom-energy.org /teachers/energy_tour/pg1.html (724 words)

	Mechanical Energy (Site not responding. Last check: 2007-11-04)
		Mechanical energy is the energy which is possessed by an object due to its motion or its stored energy of position.
		Because of the springs have mechanical energy (in the form of elastic potential energy), it is able to do work on the dart.
		As the blades spin, their energy is subsequently converted into electrical energy (a non-mechanical form of energy) and supplied to homes and industries in order to run electrical appliances.
	www.glenbrook.k12.il.us /gbssci/phys/Class/energy/u5l1d.html (1301 words)

	The Secret Lives of Eenrgy - The Energy Story - Energy Types
		Electrical wiring systems like the one in your house are designed to handle a certain amount of current or amperes, and you can find many household appliances that are rated based on their current needs.
		Since electrical energy is based on the motion of electrons, it is a kinetic form of energy.
		Electrical energy is found in nature as lighting during thunderstorms and as static electricity when we rub our shoes on the rub and touch a metal doorknob.
	www.fi.edu /guide/hughes/10types/typeselectric.html (362 words)

	electrical energy
		Electrical energy is energy associated with the separation of charge, that is, a type of potential energy that results from the attraction or repulsion experienced by opposite or like charges, respectively.
		The quantity that reflects the magnitude of electrical energy is called potential, symbolized E, and is measured in units of volts, symbolized V (a volt is defined as 1 joule / coulomb).
		A photovoltaic cell (or "solar" cell) is a device constructed from semiconducting materials which serves to convert electromagnetic energy ("light") to electrical energy.
	www.uncp.edu /home/dooling/phs120mod3a.htm (837 words)

	The Energy Story - Chapter 4: Circuits
		This energy appears as heat, and the scattering is a resistance to the current.
		The current of electricity is the water flowing in the hose and the water pressure is the voltage of a circuit.
		This charge changes into electrical energy when the poles are connected in a circuit -- similar to connecting the two poles on opposite ends of a battery.
	www.energyquest.ca.gov /story/chapter04.html (1296 words)

	ELECTRICAL ENERGY (Site not responding. Last check: 2007-11-04)
		Now grid and distribution technology allows for remote purchasing of energy, and similarly innovative generation technologies offer local electrical generation.
		Electricity was generated mainly from fossil fuel, as the case is today.
		Earlier this century nuclear energy was celebrated as the "new king" but grave concern about nuclear accidents strangulated the young industry, and only recently it makes a comeback.
	www.tryagain.com /humcivil/elecpowr.htm (136 words)

	Electrical Energy (Site not responding. Last check: 2007-11-04)
		An electrical device that has a power of 1 W converts one joule of energy to another form every second (1 J/s).
		By comparing the electrical energy supplied to the motor with the gain in potential energy of the mass you can calculate the efficiency of the motor as a machine used for lifting.
		Without making any measurements, make a guess of what you would expect for the efficiency of this electric motor; that is, guess the percentage of the electrical energy that goes into lifting and the fraction that is wasted as heat.
	physics.uwstout.edu /Univphys2/labs/elecenergy.htm (955 words)

	Eagle-Research: Electrical Free Energy
		This electrical energy is 'Free' to whoever converted it, except for the costs and responsibility of the equipment.
		Usually an electric utility is formed to convert energy, and then the resulting electricity is sold to you.
		Example; the potential energy of water behind a dam is converted to kenetic energy through pipes and to mechanical energy in a turbine and finally to electrical energy when the turbine drives a generator.
	www.eagle-research.com /fenergy/elect.html (279 words)

	DHHS (NIOSH) Publication No. 87-103
		The exact time span between the worker contacting electrical energy and the beginning of CPR is unknown, but it is reasonable to assume that it was longer than 4 to 6 minutes.
		In Case #2, the worker's contact with electrical energy was prolonged and a coworker who aided him received an electrical shock, because coworkers did not know how to de-energize the circuit.
		No one who works with electric energy should work alone, and in many instances, a "buddy system" should be established.
	www.cdc.gov /niosh/87-103.html (1546 words)

	Scientific Forms of Energy
		Energy is found in different forms, such as light, heat, sound and motion.
		Electrical charges moving through a wire is called electricity.
		Energy changes form, but the total amount of energy in the universe stays the same.
	www.eia.doe.gov /kids/energyfacts/science/formsofenergy.html (918 words)

	electric power: Sources of Electrical Energy
		Electrical energy occurs naturally, but seldom in forms that can be used.
		While some electric plants derive mechanical energy from moving water (hydroelectric power), the vast majority derive it from heat engines in which the working substance is steam.
		Windmill “farms,” at which rows of windmills are joined together as the source of electrical energy, serve as a significant, though minor, source of electrical energy in coastal and plains areas.
	www.infoplease.com /ce6/sci/A0860501.html (960 words)

	Energy Efficiencies & Electrical Safety (Site not responding. Last check: 2007-11-04)
		This do-it-yourself home energy audit calculates your home's energy use based on a detailed description of the home, its appliances and geographic location.
		If the electricity flowing into the circuit differs by even a slight amount from that returning, the GFCI will quickly shut off the current flowing through that circuit.
		Electricity can travel down the strings of kites or balloons that contact power lines, and can cause shock or fire.
	www.tec.coop /services/energy_efficiencies.shtml (1300 words)

	Chemical Energy
		In this case, the energy source came from chemical reactions instead of at the expense of internal energy described in the previous module.
		Endothermic reactions absorb energy, and in all cases, the energy is supplied from another source, in the form of electrical energy, heat or light.
		Like the internal energy, enthalpy is also a thermodynamic state function, depending only on the initial and final states of the system, but not on the rate of reaction.
	www.science.uwaterloo.ca /~cchieh/cact/c120/chemener.html (1777 words)

	Distributed Energy Program: Electrical Load as a Reliability Resource
		For electricity markets to function in a truly competitive and efficient manner, it is not enough to focus solely on improving the supply of power.
		To the extent that this demand is flexible for an individual customer, he or she will buy less electricity when it is more expensive and shift demand to periods when electricity is cheaper—washing clothes and dishes in the late evening or on weekends instead of midafternoon, for example.
		Today, such variations in price are hidden from most electricity customers, who typically pay their utilities a fixed rate for each unit of electricity consumed, regardless of the time it was used.
	www.eere.energy.gov /de/electrical_load.html?print (680 words)

	Chemical Energy
		The energy held in the covalent bonds between atoms in a molecule is called chemical energy.
		ATP is the molecule used by life to carry chemical energy.
		The bond between two of its phosphate groups carries a lot of energy because both phosphates have negative electric charge.
	www.historyoftheuniverse.com /chemener.html (214 words)

	Electrical Energy and Electrical Potential
		Since the electrical potential energy can change depending on the amount of charge you are moving, it is helpful to describe the electrical potential energy per unit of charge.
		The energy per unit of charge is often called voltage so it is symbolized with the capital letter V. Work or energy can be measured in Joules and charge is measured in Coulombs so the electrical potential can be measured in Joules per Coulomb which has been defined as a volt.
		The electrical potential (not energy) is the amount of energy per unit of charge.
	regentsprep.org /Regents/physics/phys03/apotdif (968 words)

	Biomass Program: Electrical Power Generation
		Power from biomass is a proven commercial electricity generation option in the United States.
		The turbine is connected to an electric generator, so as the steam flow causes the turbine to rotate, the electric generator turns and electricity is produced.
		This allows the energy in biomass to be converted to electricity with the high efficiency (in the 33-37% range) of a modern coal-fired power plant.
	www1.eere.energy.gov /biomass/electrical_power.html (650 words)

	ENGnetBASE: Engineering Handbooks Online (Site not responding. Last check: 2007-11-04)
		The growing importance of renewable energy sources, control methods and mechanisms, and system restoration has created a need for a concise, comprehensive text that covers the concepts associated with electric power and energy systems.
		Electrical Energy Systems fills that need, providing an up-to-date introduction to this dynamic field.
		After providing an overview of electric power and machine theory fundamentals, he offers a practical treatment-focused on applications-of the major topics required for a solid background in the field, including synchronous machines, transformers, and electric motors.
	www.engnetbase.com /ejournals/books/book_summary/summary.asp?id=408 (181 words)

	Electrical Potential Energy
		A third type of potential energy we mention is that due to the electrical force - this is the force of attraction between electric charges that causes that annoying static cling in your dryer.
		We will discuss this in more detail in Chapter 9 - for now, we only mention that the ``voltage'' of a car battery or household outlet is actually a measure of the electrical potential energy between two terminals.
		On your electric bill one can find the number of ``kilowatt-hours'' of electricity that has been used in a month - this is a measure of the electrical energy that has been consumed.
	theory.uwinnipeg.ca /mod_tech/node34.html (211 words)

	Renewingindia.org: Electrical Energy Efficiency (Site not responding. Last check: 2007-11-04)
		Energy conservation in electrical systems sometime could be very tricky leading to problems and net loss if implementation of conservation measures are not carried out after suitable study of the existing system.
		The energy savings can then be calculated by taking the reduction in power at each condition and estimating the savings based on the actual (or expected) operating time at that condition.
		It should be noted that energy saving properties of softstarters may adversely affect the stability of certain drive system due to reduction of the developed torque.
	www.renewingindia.org /eefelec.html (1004 words)

	Statement of Principles Regarding a Comprehensive National Electrical Energy Policy
		NEMA believes energy efficiency is a national concern that should be driven by market forces to achieve energy efficiency and conservation.
		NEMA believes that maintaining adequate supplies of electrical power at the lowest possible cost, while ensuring reliability with enforceable standards, is crucial to an effective and successful national electrical energy policy.
		NEMA supports a national electrical energy policy that includes broad choices of economically and scientifically-sound technology for the generation and distribution of power in the United States.
	www.nema.org /energy/energypolicy.html (589 words)

	Chemical Energy
		Chemical energy is the greatest source of energy used by man. From flashlight batteries to commerical airlines, it is the energy released from chemical reactions that power our economy.
		Heat energy is absorbed when the ammonium and nitrate ions break apart leaving the liquid mixture cold, which feels nice on a twisted ankle.
		The total amount of energy released in a known reaction can be calculated very accurately from tables of molecular bonding energy found in many chemistry texts.
	www.uvi.edu /Physics/SCI3xxWeb/Energy/ChemicalEnergy.html (1290 words)

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