Examples are motor‚ lamp‚ or display. Connection - allows electric current to flow. Examples are wire and cable. [pic] Figure 2.1: Basic electric circuits. The basic electronic communication circuit composed of electronic (or electrical) components are: A voltage source Resistors‚ Capacitors‚ and Inductors While the basic parameters of any electronic communication circuits are: Voltage (in Volts) Current (in Ampere)‚ and Power (in Watts) Figure 2.2: The schematic diagram
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Etymology of the Word Thyristor A thyristor is a solid-state semiconductor device with four layers of alternating N and P-type material. The thyristor or Silicon Controlled Rectifier (SCR) was proposed by William Shockley in 1950 and supported by Bell Laboratories‚ formerly known as AT&T Bell Laboratories. It was developed in 1956 by power engineers at General Electric (G.E.) led by Gordon Hall and commercialized by G.E. ’s Frank W. "Bill" Gutzwiller (1). There are various types of thyristors;
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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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work hand in hand with the frequency of the radio waves and the fluctuation currents that carry radio signals. Radio Frequency has different types of properties but ones that are most important are the radiation of electromagnetic waves cause by the energy in a RF current. Usually an electromagnetic wave is the main base of what is known to be Radio Technology. RF can be found emitting around conductors of electrical currents‚ they are usually not found within the conductors themselves but usually
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ARE TOLD TO DO SO Section A: Short answer questions. Answer ALL TEN questions. 1. Draw a labeled diagram of an atom 2. Define Current and state its symbol and unit 3. Draw the symbol for a battery 4. List two types of resistors 5. What is the formular for voltage in terms of current and resistance? 6. Define direct current 7. What s the difference between Energy and Power? 8. What is the color code of a 2500Ω resistor with 5% tolerance? 9. Define
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liberalized the electricity market in ways that have led to the separation of the electricity transmission business from the distribution business.[1] Transmission lines mostly use three-phase alternating current (AC)‚ although single phase AC is sometimes used in railway electrification systems. High-voltage direct-current (HVDC) technology is used only for very long distances (typically greater than 400 miles‚ or 600 km); submarine power cables (typically longer than 30 miles‚ or 50 km); or for connecting
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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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f. is induced in the neighbouring coil‚ that is‚ if a varying current is set-up in a circuit induced e.m.f. is produced in the neighbouring circuit. The varying current in a circuit produce varying magnetic flux which induced e.m.f. in the neighbouring circuit. INTRODUCTION A transformer is an electric device which is used for changing the A.C. voltages. A transformer is most widely used device in both low and high current circuit. As such transformers are built in an amazing strength
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Alternating Current Theory - J R Lucas An alternating waveform is a periodic waveform which alternate between positive and negative values. Unlike direct waveforms‚ they cannot be characterised by one magnitude as their amplitude is continuously varying from instant to instant. Thus various forms of magnitudes are defined for such waveforms. The advantage of the alternating waveform for electric power is that it can be stepped up or stepped down in potential easily for transmission and utilisation
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undoubtedly two of the most influential individuals of the current industrial world. Their works and discoveries brought about significant advances in science as well as their availability to numerous people throughout the world. In popular culture‚ Tesla is well known for his creation of the polyphase alternating current energy (AC) transmission system while Edison is famous for his light bulb as well as his staunch position for the direct current (DC) energy transmission system. There are a number
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