electric

Electricity is the set of physical phenomena associated with the presence and flow of electric charge. Electricity gives a wide variety of well-known effects, such as lightning, static electricity, electromagnetic induction and electric current. In addition, electricity permits the creation and reception of electromagnetic radiation such as radio waves.
In electricity, charges produce electromagnetic fields which act on other charges. Electricity occurs due to several types of physics:
electric charge: a property of some subatomic particles, which determines their electromagnetic interactions. Electrically charged matter is influenced by, and produces, electromagnetic fields, electric charges can be positive or negative.
electric field (see electrostatics): charges are surrounded by an electric field. The electric field produces a force on other charges. Changes in the electric field travel at the speed of light.
electric potential: the capacity of an electric field to do work on an electric charge, typically measured in volts.
electric current: a movement or flow of electrically charged particles, typically measured in amperes.
electromagnets: moving charges produce a magnetic field. Electric currents generate magnetic fields, and changing magnetic fields generate electric currents.
In electrical engineering, electricity is used for:
electric power where electric current is used to energise equipment;
electronics which deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes and integrated circuits, and associated passive interconnection technologies.
Electrical phenomena have been studied since antiquity, though progress in theoretical understanding remained slow until the seventeenth and eighteenth centuries. Even then, practical applications for electricity were few, and it would not be until the late nineteenth century that engineers were able to put it to industrial and residential use. The rapid expansion in electrical technology at this time transformed industry and society. Electricity's extraordinary versatility means it can be put to an almost limitless set of applications which include transport, heating, lighting, communications, and computation. Electrical power is now the backbone of modern industrial society.

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  1. frameblend

    Wanted Looking for 120" Electric projector screen

    Hi all, Looking for a 120" electric drop down screen. Something like a Sapphire or Grandview, or anything else that fits the bill. Must be non-ALR, ideally matte grey or white with gain 0.8 to 1. All I ask is that it's nice and straight! Thank you.
  2. P

    Wanted Draper ReAct 3.0 Electric screen wanted.

    I'm after a Draper ReAct 3.0 (or better) electric screen, at least 105 inches diagonal at 16:9, to replace my damaged one. Screen surface must be perfect, case/wiring/control not important. Anything out there? May travel reasonable distance from Dartford/Bedford/Bristol to collect if not...
  3. WilbertA

    Tesla Model 2 (Redwood)

    There have been a number of artists impressions of what the model 2, code name “Redwood” might look like but none of them seem to be based on pictures that Tesla showed at one of their presentations? Is this what the new car will look like or something different?
  4. D

    Question Double undercounter oven Samsung Dual Cook

    I currently have a double electric under counter oven. I need a new one. It is 70cm high. I almost bought a Samsung dual cook as they look great with their dual cook feature and air frying but I’ve just realised it’s only 60cm high What will happen with the 10cm gap and is a 60cm ok under the...
  5. 152bobby

    Question Seip C75 Electric Garage Opener

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  6. HD2k15

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  7. Joe Pineapples

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  8. W

    Charging 2 x Teslas using one Zappi charger?

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  9. chenks

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  10. B

    Question portable heater that runs off battery not electric

    hi i have got a question i need to ask everyone right i live in a house with no gas bolier or gas radiators and i use at the moment a electric convector heater that plugs into the wall i use that to keep warm but i keep getting a high electric bill so my question is can i buy a battery heater...
  11. jaipal2004

    Question Fuse Board - Weirdness

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  12. CLH

    Question Green EV plates on hybrids

    Interesting one around my area. I was recently behind a Renault Captur (which are at best PHEV's) with a green plate. I wondered what benefit there was to having a green plate other than to "look EV" particularly as there is the potential for a fine. Wrote it off as whatever, their life...
  13. WilbertA

    Electric Buses

    I don’t use buses but I was parked up the other day with my window down and the noise from a nearby diesel bus was absolutely horrendous. I’m surprised there isn’t some kind of law to limit the noise? Luckily I’d put my window up but when it pulled away the smog coming out the back was also...
  14. J

    Add a thermostat to linear electric fireplace

    My in wall linear electric fireplace came only with a hand remote, how to I connect a programmable thermostat to it?
  15. jeremybellamy

    EV charging price

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  16. javac9

    Question What do I need to get the sound of my electric guitar through the surround system of Denon AVR-X1700H

    So there is a room equipped with a Denon AVR-X1700H surround system. I would like to use it for practicing my electric guitar. Since I don't have much AV experience, I'd like to know what additional devices/equipment do I need to connect my amplifier to the Denon? And yes, I also want to be able...
  17. Stuart Wright

    Stop BS

    EV naysayers please watch this with an open mind.
  18. raz77

    Model Y camping thread

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  19. B

    Faulty Panoramic Electric fire - how deal with seller

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  20. M

    Model 3 revamp

    Specs from CarWow: Highlights: No stalks Vent front seats Rear small screen. All around acoustic glass. New suspension 8 percent more efficient.
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