From wikipedia - electric power
Electric power is the rate at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.
Electric power is usually produced by electric generators, but can also be supplied by sources such as electric batteries. It is usually supplied to businesses and homes by the electric power industry through an electric power grid. Electric power is usually sold by the kilowatt hour (3.6 MJ) which is the product of power in kilowatts multiplied by running time in hours. Electric utilities measure power using an electricity meter, which keeps a running total of the electric energy delivered to a customer.
Electrical power provides a low entropy form of energy and can be converted into motion or other forms of energy with high efficiency
The use of electrical motion control while on the road
Undoubtedly, one of the most interesting uses of electricity in everyday life is a traffic light. There are even special systems that allow long phase justification of the amount of light waiting to drive through the intersection cars. This is a very interesting solution, but it also can be subject to failure. Then it is necessary to help electricians to solve problems, and control traffic can be much more difficult than the use of traffic lights. Electricity can make the traffic jams formed especially in large cities are less burdensome for enjoying the busy streets of people. However, you need time to time to monitor these intelligent systems to ensure their trouble-free operation.
Electronics in the car - better possibilities of using the car
While the electrician is most often associated with the assembly and repair of electrical installations his knowledge could prove to be very important when carrying out repairs on cars, not just those cars, but also trucks or such other means of transport such as buses and motorcycles. It turns out that without access to electricity in the car or not we could use the radio, or for example, from the wiper during adverse weather. Electricity in cars is very common and more attention devoted its people planning the production of new car models. They have already been entered into force on cars that do not use the fuel, and the move thanks to electricity.