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AC Power - How does it work?
Power in an electric circuit is the rate of flow of energy past a given point of the circuit. In alternating current circuits, energy storage elements such as inductors and capacitors may result in periodic reversals of the direction of energy flow. The portion of power that, averaged over a complete cycle of the AC waveform, results in net transfer of energy in one direction is known as active power (sometimes also called real power). The portion of power due to stored energy, which returns to the source in each cycle, is known as reactive power.
Źródło: https://en.wikipedia.org/wiki/AC_power
Computerization measurement of electricity
Very often in electrical engineering they used different computer programs. They are used not only for the design of electrical networks in even the smallest details, but also makes using them you can monitor the status of installations already in operation. Thanks to computer programs monitor the status of the electrical system has become almost a snap. Hold install the software with specific functions allows, for example, to measure the resistance of the electrical installations and other properties and measured in a direct way would have to be carried out in a more complicated formula.
Science in electrical engineering?
Electrical installations, especially those which will be installed in buildings with complicated structures often require the creation of a very difficult project. Special computer programs enable electricians much easier to plan where and how they will run the wire, where will be located branch and so on. In this way, more and more electricians may remind us of specialists, because the design of electrical networks at the present time is done properly only through the computer. Special programs also allow control of parameters during operation of the installation.