"Alternating Current" Essays and Research Papers

Temperature compensation is simple DISADVANTAGES  Accurate location of brush holder is necessary  Ripple : The output voltage is not pure dc . There are ripples in output due to finite number of coil and commutator  Friction, hysteresis and eddy current losses add to torque and power requirements.  During commutation inductive voltage is generated in the coil. It gives demagnetizing effect to the main field.  At higher speed brush vibration problem is troublesome . AC TACHOGENERATOR AC...

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INTRODUCTION A full wave rectifier is a device which is used to rectify all the alternating current components in an alternating supply and make it purely a direct current. The two alternating halves of an alternation current are rectified in a full wave rectifier which is an advantage over a half wave rectifier. Most of electronic devices cannot withstand very high voltage or alternating current due to its intense high power. The use of batteries in all devices is not practical as their replacement...

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created by Adam Smith, which characterize the Industrial Revolution in the United States, led to a dramatic increase in competition and a transcendence in the rate of innovation, it is best exemplified through Thomas Edison and Nikola Tesla’s war of currents. Adam Smith is regarded as the father of capitalism due to his work in political economics, specifically production, consumption of wealth, accumulation, and distribution (Welch). One of his main motives in creating his book, “Wealth of Nations”...

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decorations, letterings (backdrops), and designs. Scope and Delimitation The study aims to improve the Styro-Cutters that are commonly used today. Additional features are offered like its versatility because it can be used in both Direct and Alternating current. Also, it has adjustable knob that allows the user to cut Styrofoam in different sizes. It also has a built-in trashcan that helps the user clean up the mess after cutting the Styro. It’s also foldable so it is very handy and easy to carry....

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electrical current is applied. This varying current produces magnetic flux that flows around the core. This varying magnetic flux causes the secondary winding to induce an electromotive force (EMF) and this will cause a current to flow from the secondary winding. This is called mutual inductance, when the change in current in one winding results in an induction of voltage in the other winding. The varying electrical current is most commonly alternating current but pulsed continuous current can be used...

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George Westinghouse was an American entrepreneur and engineer. He was responsible for the introduction and development of altering current for light and power. Westinghouse invented the railway air brake and was a pioneer of the electrical industry. He was one of Thomas Edison’s main rivals in the early implementation of the American electricity system. This man founded 60 companies, eventually receiving over 100 patents for his work with the desire to turn ideas into enterprises. George Westinghouse...

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electrical energy which is generated, distributed and utilized in sinusoidal form. This type of energy production are called alternating current (AC) source. Due to the presence of different types of loads in a circuit, the phase difference or angle (θ) is form between the voltage and the current vector. Figure1 below shows the typical vector diagram of AC voltage and current. This angle (θ) is called the power factor angle and the cosine of this angle is called the power factor. Power factor may be...

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VCE= 0.3v A BC108 transistor with the stated configuration was used. A 9V DC supply was used to power the entire system. Direct and alternating current flow in this circuit. The direct current is brought about by the 9V DC battery while the alternating current generator is the carbon microphone. Salgat (2007) stated that capacitors do not allow direct current through them. Hence the DC equivalent of FIG. 3.1 is as shown in FIG 3.2 and FIG 3.3. R1 Q1 R2 FIG 3.2 Ic IB...

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produce almost all of the electricity used by people. They supply the electric power that runs machines in factories, provide lighting, and operate appliances in the home. There are two main types of generators - alternating-current (AC) generators (sometimes called alternators) and direct-current (DC) generators (also known as dynamos). Both types of generator work on the same principles. How A Generator Works (Basic Principles) A generator does not create energy - "energy cannot be created or destroyed...

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the induction motor needs but one power supply and can be made with inexpensive materials. The induction motor is powered by alternating current (AC) Tesla was one of the first to discover AC. He believed that it was better than direct current (DC) which had been made popular by Thomas Edison years before. For a number of years Edison and Tesla fought “the war of the currents” which was a series of disagreements over which was better, AC or DC. Ultimately, everyone agreed that AC was far superior,...

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