How is electricity produced ?
Answer:
You question is too vague.
In casual usage, the term electricity is applied to several related concepts that are better identified by more precise terms:
By rubbing the universe together.
its produced in many ways like hydro electricity and theremal electricity wind electricity and many many more
a bloody big hamster running around inside a big wheel..really big generators
Methods of generating electricity
Turbines
Large Dams such as Hoover Dam are able to provide large amounts of hydroelectric power.Rotating turbines attached to electrical generators produce most commercially available electricity. Turbines are driven by a fluid which acts as an intermediate energy carrier. The fluids typically used are:
steam - Water is boiled by nuclear fission or the burning of fossil fuels (coal, natural gas, or petroleum). Some newer plants use the sun as the heat source: solar parabolic troughs and solar power towers concentrate sunlight to heat a heat transfer fluid, which is then used to produce steam.
water - Turbine blades are acted upon by flowing water, produced by hydroelectric dams or tidal forces,
wind - Most wind turbines generate electricity from naturally occurring wind. Solar updraft towers use wind that is artificially produced inside the chimney by heating it with sunlight.
hot gases - Turbines are driven directly by gases produced by the combustion of natural gas or oil.
Combined cycle gas turbine plants are driven by both steam and gas. They generate power by burning natural gas in a gas turbine and use residual heat to generate additional electricity from steam. These plants offer efficiencies of up to 60%.
Reciprocating engines
Small electricity generators are often powered by reciprocating engines burning diesel, biogas or natural gas. Diesel engines are often used for back up generation, usually at low voltages. Biogas is often combusted where it is produced, such as a landfill or wastewater treatment plant, with a reciprocating engine or a microturbine, which is a small gas turbine.
Photovoltaic panels
Unlike the solar heat concentrators mentioned above, photovoltaic panels convert sunlight directly to electricity. Although sunlight is free and abundant, solar electricity is still usually somewhat more expensive to produce than large-scale mechanically generated power due to the cost of the panels. Low-efficiency silicon solar cells have been decreasing in cost though, and multijunction cells with close to 30% conversion efficiency are now commercially available. Over 40% efficiency has been demonstrated in experimental systems. Until recently, photovoltaics were most commonly used in remote sites where there is no access to a commercial power grid, or as a supplemental electricity source for individual homes and businesses. Recent advances in manufacturing efficiency and photovoltaic technology, combined with subsidies driven by environmental concerns, have dramatically accelerated the deployment of solar panels. Installed solar capacity is growing by 30% per year in several regions including Germany, Japan, California and New Jersey.
Other generation methods
Various other technologies have been studied and developed for power generation. Solid-state generation (without moving parts) is of particular interest in portable applications. This area is largely dominated by thermoelectric (TE) devices, though thermionic (TI) and thermophotovoltaic (TPV) systems have been developed as well. Typically, TE devices are used at lower temperatures than TI and TPV systems. Piezoelectric devices are used for power generation from mechanical strain, particularly in power harvesting. Betavoltaics are another type of solid-state power generator which produces electricity from radioactive decay.
Fluid-based magnetohydrodynamic (MHD) power generation has been studied as a method for extracting electrical power from nuclear reactors and also from more conventional fuel combustion systems.
Electrochemical electricity generation is also important in portable and mobile applications. Currently, most electrochemical power comes from closed electrochemical cells ("batteries"), which are arguably utilized more as storage systems than generation systems, but open electrochemical systems, known as fuel cells, have been undergoing a great deal of research and development in the last few years. Fuel cells can be used to extract power either from natural fuels or from synthesized fuels (mainly electrolytic hydrogen) and so can be viewed as either generation systems or storage systems depending on their use.
In general it can be produced by a moving magnetic field with a coil, or by chemical reactions that cause the flow of electrons from one chemical to another (just basic, a bit more to it than that).
A magnetic field can be moved by water wheel (big ones are hydroelectric dams), steam (big nuke generators) or mechanical means (engines of every size burning many different fuels) and that also includes wind turbines.
Chemical batteries come in a huge number of forms and they are the real big news these days from, especially, the hybrid car industry.
As has already been mentioned, your question is a little too vague for me to be able to answer definitively, but if I assume you are asking how the electricity is generated which we use in our homes, then most of it is produced by machines called generators. These are basically like electric motors working in reverse (in fact some hydroelectric power stations use machines which function as both motors and generators, although not at the same time). Something is used to turn a cylinder ("shaft"), which creates a rotating magnetic field which in turn causes electrical current to flow in wires wrapped in a coil inside the magnetic field. A motor does the reverse - current is applied to the machine causing the central cylinder to rotate.
The power to turn the shaft usually comes from a turbine, which can be powered by steam or other hot gases, or by water.
Faraday's Law..voltage produced is equal to the rate at which we spin a conductor thru a magnetic field. The faster, or bigger the better. We use 60 times per sec, so we have 60Hz.
lots of ways, but it all boils down to.. for the most part a turbine turning a coil around a magnet or vise versa causing the generation of electricity via the aligning and dis-aligning of electrons to produce a charge
electicity is produced when a cathode and anode come in contact
one way is by rotating a conductor in a magnetic field .
how big you make it depends upon what your needs are.
voltage
current
frequency
basically, by negatively charged streams of subatomic particles called electrons, which carry energy classified as electricity
they move along connecting paths due to potential difference: i.e. difference in the amount of charges between two places
electricity is produced by moving electrons from one thing to another. This is usually caused by a form of energy.e.g.friction
a physical movement or rotation is used to move a magnetic field at right angles to a conductor. (sounds more complicated than it is) This induces a voltage in the conductor (or wire). (electricity)
probably a few animations on a web site some where.
Electricity is produced by creating a difference in "potential" between two points, meaning a higher "negative" electrical charge or a higher ratio of electrons to protons than another point, then connecting them so there is a flow of electrons from the higher concentration to the lower concentration. There are many ways to make this happen, but that is how it is produced.
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