Coal is made from dead plants.
In the United States a little about 50%. See http://www.eia.doe.gov for more details.
Simplest version:
Burn the coal, which generates heat. Use the heat to boil water. The steam from the boiling water forces blades on a generator fan to turn, which turns the generator. Electrical current is then produced. This is a gross oversimplification, but you get the point.
More detailed version:
-- The heat is used to boil water.
-- The steam is directed through turbine vanes.
-- The turbine spins an electrical generator.
in your question itself you have said that coal-fired yes electricity is generated by burning coal a large amount of heat is generated as a result. this heat energy is used to heat water inside the boiler tubes. the water is converted to dry saturated steam at this state the temperature is about 540 degree celcius and pressure about 140 kg/sq.cm. this steam is made to expand in a turbine whose shaft is coupled to a generator. when turbine blade rotates due to steam the generator armature also rotates resulting in generation of electricity. simply the heat energy produced by burning coal to heat steam is converted into mechanical energy in steam turbine and then into electrical energy by the generator.....
1 tonne of coal generates 2,460 Kilowatt hours of electricity.
Coal is one of the fossil fuels burned to fire up steam turbines which in turn power massive generators which create the electrical energy.
-- Coal is burned in air, releasing heat.
-- The heat is used to boil water.
-- The steam is directed through turbine vanes.
-- The turbine spins an electrical generator.
Electricity does flow back to the power plant. This electricity is what forms the circuit needed to actually deliver the electricity to you when you need it.
Because the power plant is the source of electricity
House Load of a Power Plant is also known as Auxiliary Power Consumption or Units Used on Works.It is the electrical power needed to drive the pumps and fans that support the operation of the power plant.Typically the power plant metering is set up to measure the electricity produced by the generator at the terminals. A seperate meter will measure the electricity used by the auxiliaries, at the unit transformer.Auxiliary Power Consumption is often expressed as a percentage of Units Generated, so:Aux Power = ( Units Used on Works / Units Generated ) x 100 %% MWh MWhTypical Auxiliary Power Consumption depends on the type of plant:Plant Type%Coal-fired Thermal6.5 - 8.0Open Cycle Gas Turbine2.5 - 3.5Combined Cycle Gas Turbine1.0 - 1.5
Whether the electricity is generated by conventional power stations, or hydroelectric power generation, the electricity used in homes and businesses will still be the same, and used the same.
Some machines that make electricity are:generatoralternatorthermo-electric generatorbatterysolar cellsetc.
France
By selling the electricity generated from the heat of the reactor. Same as fossil fuel power plants do, sell electricity generated from the heat of burning.
Hydroelectric power plants generate electricity by the action of the "falling" water spinning a turbine which rotates a wire inside a big magnet.
100% of electricity is electrical power.
electricity is made in a power plant.
Power plants.
It is not practical for you to have your own nuclear power plant at home, however, it is perfectly practical for you to use electricity that has been generated in a nuclear power plant and then transmitted to your home through power lines.
Electricity generated by water power alone is hydroelectric power.
Electricity produced by magnetism is called induced voltage. It is by induction, the passage of a magnetic field across a conductor, that a voltage will be induced ("caused" or "made to happen") in that conductor.
Nuclear energy/electricity varies, but in 2007, USA generated an average of 12.4 billion kilowatt-hours per-nuclear plant.
10-20 %. For example year 2010 14,5% of all electricity supply in Finland was generated by hydro power.
Hydroelectricity (generated from water), geothermal electricity (generated from the landmass), solar thermal power (generated from the sun) and wind power. (generated from wind)