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electricity

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electricity

The flow of electrons in a circuit. The speed of electricity is the speed of light (approximately 186,000 miles per second or 300,000,000 meters per second). In a wire, it is slowed due to the...

Dictionary

Definition: electricity

The flow of electrons in a circuit. The speed of electricity is the speed of light (approximately 186,000 miles per second or 300,000,000 meters per second). In a wire, it is slowed due to the resistance in the material.

Its pressure, or force, is measured in "volts," and its flow, or current, is measured in "amperes" or simply "amps." The amount of work it produces is measured in "watts" (amps X volts).



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  • San Diego burger joint saves electricity with LED lighting

    Even though Hodad's second location is twice the size of its original restaurant, it uses the same amount of electricity.

    Blog posts | April 6, 2012 10:23am PDT

  • Data center as furnace? Microsoft researchers explore idea

    By rethinking where cloud data centers are located, we could make our electricity consumption go farther by better using exhaust heat, suggest a new white paper.

    Blog posts | November 29, 2011 5:01am PST

  • Facebook building server farm just south of Arctic Circle

    Two separate reports indicate Facebook is building a server farm in Luleå, Sweden. The news is expected to be made official tomorrow morning.

    Blog posts | October 26, 2011 8:53pm PDT

  • Knocked off the grid in Jersey: Surviving on mobile tech

    Hurricane Irene severed all power to my town and forced me into using mobile technology as my main link to the outside world.

    Blog posts | August 30, 2011 10:53am PDT

  • The green credentials of the common refrigerator

    Thanks to industry innovation and a supportive regulatory climate, by 2014, a new refrigerator will use just one-fifth the power a fridge needed in the mid-1970s.

    Blog posts | August 29, 2011 10:43am PDT

  • Key hire spells new growth phase for heat recovery start-up Alphabet Energy

    At the start of 2011 when many of you were still on holiday, I visited the web site for start-up Alphabet Energy, because I figured the company must be ready to come out of stealth mode. Turns out...

    Blog posts | February 1, 2011 10:00am PST

  • Taking some heat ... and turning it into electricity

    Harnessing heat for useful purposes isn't really anything new. Um, that's kind of what steam does and has been doing for more than 100 years. I actually wrote a few months ago about a data center...

    Blog posts | June 9, 2010 8:51am PDT

  • Chemistry of clean coal

    Reaction Design works on cleaning up coal burning power plants.

    Blog posts | November 11, 2009 8:43pm PST

  • Happy hardware: tech lobbyist brings home the bacon

    Fed money goes for energy and water industries to get more efficient.

    Blog posts | November 5, 2009 11:16am PST

  • The current system is stacked against greentech in big buildings

    Illinois tech company bucks the system to build green headquarters.

    Blog posts | November 1, 2009 11:39am PST

  • Geothermal gets its day in the sun

    Geothermal grants worth over $300 million given out by Department of Energy.

    Blog posts | October 31, 2009 7:16am PDT

  • What is the smart grid?

    At the Green: Net '09 Conference in San Francisco, Jesse Berst, managing director of Global Smart Energy, breaks the smart grid down into three components: smart devices, two-way communication,...

    Videos | March 25, 2009 3:29pm PDT

  • The Future Of... Mobile Device Chargers

    No power? No problem. ZDNet correspondent Sumi Das takes a look at kinetic energy technology that charges mobile phones and devices without ever needing an electrical outlet. The mobile device...

    Videos | November 19, 2008 12:24pm PST

  • Solar power, no money down, could prove profitable

    You get a solar installation, you could get positive cash flow, and you pay no money down. Sounds like an offer you might read in some spam note from Bulgaria. But it's a legitimate offer from...

    Blog posts | June 30, 2008 6:19pm PDT

  • Waste not. ElectraTherm turns "waste" heat into an electricity source

    A couple of months back, I reported about an IBM data center project in Switzerland that was shunting its excess heat "waste" toward warming up a public swimming pool. Along those lines, a company...

    Blog posts | June 7, 2008 7:20pm PDT

  • Images: Supersize solar power

    Utility-scale solar power plants--using everything from giant reflective dishes to plastic balloons--are changing the look of solar power.Parabolic troughs, one of which is shown here, have been...

  • NIMBY, but I still want the electricity

    There are some modern tehcnologies that can be wireless, especially digital tech from radio and TV to data and Internet. Not so with electricity. There are those damned wires. Almost as bad as...

    Blog posts | December 5, 2007 2:53pm PST

  • Hawaiian firm shrinks solar thermal power

    It's not as common as solar photovoltaic panels, but Hawaiian start-up Sopogy thinks small-scale solar thermal makes sense.Photos: Concentrating on solar power in Hawaii

    News items | September 14, 2007 4:00am PDT

  • Solar thermal plants go back to the future

    Start-up Ausra nabs $40 million in venture capital to build utility-scale solar power plants, an idea that is again gaining traction. Photo: Collecting sunlight

    News items | September 9, 2007 9:01pm PDT

  • "Car piece, electricity piece" & what will Nancy do?

    House Speaker Nancy Peloci (D-CA) is facing some crucial decisons on proposed changes in American energy laws. Her hometown newspaper says the Speaker hasn't said what she'll do about either...

    Blog posts | July 30, 2007 3:27pm PDT

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