A DC circuit consists of a source (e.g. battery or power supply) and a load (e.g. light bulb or electronic instrument). The electrons move from the negative terminal of the source, towards the load and then return to the positive terminal of the source, i.e. the electrons flow in only one direction . This movement of electrons will continue as long as there is a closed circuit. In contrast, the source in the AC circuit is constantly changing. The voltage of the source builds up and electrons flow through the circuit in the same way as for the DC circuit. ...
Essays on AC Power
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Introduction
The fiber optic systems are systems which use light as a mode of communication. The system includes fiber cables which allow for the transmission of light through them. Inside the cable are special coatings for protection and also to enable the transmission of light through total internal reflection (Hoss and Lacy). The light is then converted into electrical signals through the use of light detectors having in mind that the signal was produced by a light emitting diode. The use of optics is very wide since the use of light is much more efficient and also flexible being that ...
Introduction
Numerous electrical applications require an inverter, which converts Direct Current (DC) to Alternating Current (AC) power. Some of these applications require the stepping down of voltage levels when realizing this conversion, which signifies that the input DC power is greater than the AC power. Conversely, certain applications require the opposite: to step up voltage when performing the power conversion, which means that the input DC power is lower than the AC power. These requirements can be met through the use of Voltage Source Inverters and Current Source Inverters, respectively. However, some particular applications require to step down voltage for ...
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Efficient energy utilization is an important aspect of human life. The principle of conservation of energy states that energy can never be created nor destroyed. Thus, it is essential to utilize the energy available for us effectively and efficiently. Energy can be transformed from one form to another by use of appropriate transducers. When designing a house, it is essential to do it with the greatest regard to efficient energy use as well as safety to the environment. House designers should always come up with designs that promote efficient energy use. For instance, utilization of renewable energy should be maximized. ...
Lab Report
Objective: To explore the characteristics of three single-phase transformers in a three-phase configuration. Figure 1: Lab 1, Diagram. - Star- Star (Y-Y) Connection In star- star or Y-Y connection, each phase is 120° out of period with the extra two periods. In the same way, each secondary winding is 120° out of phase with the other two phases. Every primary winding is magnetically connected with secondary winding using the common leg. When talking about primary to secondary phases we will see that there is no phase difference in primary-secondary connections. It simplifies that both, primary and derived ...
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