2. Physical force or strength: Jerry needed a lot of power to hit the baseball far enough into the field in order for a home run!
3. Control and influence over other people and their actions: In her career, Jill reached a high position with lots of power and influence.
4. The political control of a country, exercised by its government or leader: The people wanted to overthrow the present government because they were exercising unfair and brutal power over the citizens.
5. The authority to act or to do something according to a law or rule: Mr. Smith had a debt problem, and the bank said that it was within his power to resolve the unfavourable situation on his bank account.
Police have the power to arrest criminals.
6. A country that has military or economic resources and is considered to have political influence over other countries: There have always been nations whose power has been used to have great impact and control over smaller and weaker nations.
7. The ability to influence people's judgments or emotions: Mr. T. used his rhetorical power to move and sway the masses of people to accept and have trust in his views as being the truth!
8. A measure of the rate of doing work or transferring energy: Power is usually expressed in terms of "wattage" or "horsepower".
9 Energy produced by electricity or fuel: Power is generated when a motor uses electrical energy or fuel instead of relying on manual labor.
10. Etymology: from Anglo-French pouair, Old French povoir, noun use of the infinitive in Old French, "to be able" from earlier podir, from Latin potis, "powerful".
EIRP is usually expressed in watts.
ERP is usually expressed in watts and is not the same as EIRP.
2. A device that measures electric power consumed, either at an instant, as in a wattmeter, or averaged over a time interval, as in a demand meter.
A demand meter is any of several types of instruments used to determine a customer's maximum demand for electric power over a time interval; generally it is used for billing industrial users.
In a direct current (DC) circuit, the current measured in amperes, multiplied by the voltage between wires, is the power in watts.
A thousand watts constitute the kilowatt, a larger and more frequently employed unit of electric power.
The voltage and current may not be in phase with each other in an alternating current (AC) circuit and, while the instantaneous power is the product of the instantaneous voltage and current, this out-of-phase relation causes the power to fluctuate between positive and negative values.
By definition, power is the rate at which energy is transformed or is made available and is measured in watthours.
From an economic viewpoint, the most important of all electrical measurements is the measurement of energy. The watthour meter in various forms can be found in nearly every home, factory, highway billboard, and other locations where electrical energy is being purchased.
Metering, installation and wiring have been governed by national, industrial, and local codes for so many years that, at least in the United States, a particular type of installation is nearly identical everywhere in the country.
Measurement of energy is almost always with a "fixed-installation metering". This provides safety because of the grounding of the meter enclosure and ease of reading as a result of a proper location and mounting.
Tamper-proof housing, which are also weatherproof where necessary, are typical structures that normally insure the integrity of the electric meter readings.
Powerline networks do not interfere with the delivery of electricity in the same circuit because the data are transmitted at a much higher frequency than the 60Hz or 50Hz used for AC (alternating current) power.
This "plant" reference is apparently linked to the action of pressing on a shovel, or some other tool, with the "sole of the foot" in order to work the soil for planting.
2. A facility that generates electrical energy using generators.
3. An assembly of equipment in an electric power system through which electric energy is passed for transmission, transformation, distribution, or switching.
2. The circuitry applied to many electrical devices, in which electric energy is generated, transmitted, transformed, and distributed in the form of heat or as a driving force to other motor-controlled systems.
2. The energy inherent in a circuit because of its position in relation to a magnetic field.
A computer power supply converts alternating current into multiple direct current voltages; for example, twelve volts is commonly used for drives, while 3.3 volts and 5 volts are used by the chips and other motherboard components.
2. A device used to convert, regulate, and transmit external power for use by the components housed inside a computer chassis.It does not necessarily follow that the higher the coefficient the better because above a certain wind speed excess energy must be wasted to avoid undue stress on the system.
The higher the power output, the longer the read range, but most governments regulate power levels to avoid interference with other devices.
2. In the larger sense, any energy source that can be ultimately traced to the action of the sun.
The SPS system, or solar power satellite system, would have a huge array of solar cells that would generate electrical power to be beamed to earth in the form of microwave energy sent to a central receiver.
As with other related "plant" references, this entry is believed to be linked to the action of pressing on a shovel, or some other planting device, with the "sole of the foot" in order to work the soil for planting.
About one-fifth of the Denmark's electricity comes from wind, which wind experts say is the highest proportion of any country.
A closer look shows that Denmark is a far cry from a clean-energy paradise.
The building of wind turbines has virtually ground to a halt since subsidies were cut back.
Meanwhile, compared with others in the European Union, Danes remain above-average emitters of the greenhouse gas carbon dioxide.
For all of its wind turbines, a large proportion of the rest of Denmark's power is generated by plants that burn imported coal.
Danish experience shows how difficult it can be for countries grown rich on fossil fuels to switch to renewable energy sources like wind power.
Among the hurdles are fluctuating political priorities, the high cost of putting new turbines offshore, concern about public acceptance of large wind turbines, and the destructive volatility of the wind itself.
Some parts of western Denmark derive 100 percent of their peak needs from wind if the breeze is up.
Germany and Spain generate more power in absolute terms, but in those countries wind still accounts for a far smaller proportion of the electricity generated. The average for all 27 European Union countries is three percent.
The Germans and the Spanish are catching up as Denmark slows down.
History of Hydropower
People have been harnessing water to perform work for thousands of years. The Greeks used water wheels for grinding wheat into flour more than 2,000 years ago.
Besides grinding flour, the power of water was used to saw wood and power textile mills and manufacturing plants.
For more than a century, the technology for using falling water to create hydroelectricity has existed. The evolution of the modern hydropower turbine began in the mid-1700s when a French hydraulic and military engineer, Bernard Forest de Bélidor wrote Architecture Hydraulique. In this four volume work, he described using a vertical-axis versus a horizontal-axis machine.
During the 1700s and 1800s, water turbine development continued. In 1880, a brush arc light dynamo driven by a water turbine was used to provide theater and storefront lighting in Grand Rapids, Michigan; and in 1881, a brush dynamo connected to a turbine in a flour mill provided street lighting at Niagara Falls, New York. These two projects used direct-current technology.
Alternating current is used today. That breakthrough came when the electric generator was coupled to the turbine, which resulted in the world's, and the United States', first hydroelectric plant located in Appleton, Wisconsin, in 1882.
For a typical silicon cell, this is at about 0.45 volts.
A collective term for inverter, converter, battery charge regulator, and blocking diode.
See duty rating for additional information.
See power factor for additional information.
A very large array of solar cells on each satellite would provide electricity, which would be converted to microwave energy and beamed to a receiving antenna on the ground. There, it would be reconverted into electricity and distributed the same as any other centrally generated power, through a grid.
The uninterruptible power supply will contain batteries.