PRINCIPLE OF GENERATION‚ TRANSMISSION AND DISTRIBUTION OF HIGH AC VOLTAGES INTRODUCTION The potential benefits of electrical energy supplied to a number of consumers from a common generating system were recognized shortly after the development of the ‘dynamo’‚ commonly known as the generator. The first public power station was put into service in 1882 in London (Holborn). Soon a number of other public supplies for electricity followed in other developed countries. The early systems
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First I am going to explain what a circuit is and what the differences they have are. An electric current is a flow of charge. The charges are given energy and made of flow using a cell or a battery. Charges can flow easily through connecting wire. The cell‚ wires‚ lamp and a switch‚ all these components are connected together and make a loop called a circuit. Current will only flow through a component if there is a voltage across that component. Voltage is the driving force that pushes the current
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Name: _________________ Wire Resistance and Ohm’s Law Go to http://phet.colorado.edu/simulations/sims.php?sim=Ohms_Law and click on Run Now. Wire Resistance and Ohm’s Law Procedure Part I Wire Resistance: open the PhET Simulation Electricity‚ Magnets‚ and Circuits Resistance in a Wire. As wire length (cm) increases‚ the resistance (Ω) _____increases_____ As wire area (cm2) increases‚ the resistance (Ω) _______decreases_______ As wire resistivity (Ωcm) increases‚ the resistance
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CHAPTER ONE INTRODUCTION A. STATEMENT OF THE PROBLEM This study aims to find out how long a lemon (Citrus limon) can last as a lemon battery powering a digital clock. B. HYPOTHESIS The researcher assumes that one lemon would last for a day or two and that the usage of more lemons would entail a longer battery time. C. OBJECTIVES Specifically‚ it aims to: 1) come up with a quantity-longevity ratio with the use of a varied quantity of lemons in the production of a lemon battery 2) find
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on. A circuit is a system that is made of three different components and they are: an energy source‚ a load or resistor‚ and a conducting wire‚ but there is the option to use a switch. Each component has a different role in a circuit. An energy source is the source of the energy‚ the load or resistor is what uses the electricity‚ the conducting wire is what connects the circuit‚ and if you use the option of a switch you can stop the flow of electrons from going through the circuit. If one of
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rubber block. 4. Hooke’s Law for Wires a. To determine the Young’s Modulus of Elasticity of the specimen wire. b. To verify Hooke’s Law by experiment. 5. Strain in Compound Wires a. To determine the modulus of elasticity of two wires and hence evaluate the equivalent Young’s Modulus of Elasticity of the combination b. To position the single applied load on the slotted link in order that both wires are subjected to common strain and hence
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’Was general haig the butcher of the Somme?’ Introduction General Haig’s title of ’butcher of the Somme’ originated after the First World War‚ when‚ due to a large number of casualties Britain suffered from the war and mostly the Somme. The people of Britain wanted someone to blame. This was a coping mechanism in which people could deal with the loss of the ’lost generation’. Feild Marshall Haig has often been called the butcher of the Somme because 20000 soldiers died on the first day of the battle
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Yes‚ Samuel Morse did invent the single-wire telegraph system but he did not invent the telegraph system. That would and should be credited to English scientists William Cooke and Charles Wheatstone. In the 1830’s Cooke and Wheatstone devised a telegraph system consisting on multiple magnetized
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Twisted-pair cable is a type of cabling that is used for telephone communications and most modern Ethernet networks. A pair of wires forms a circuit that can transmit data. The pairs are twisted to provide protection against crosstalk‚ the noise generated by adjacent pairs. When electrical current flows through a wire‚ it creates a small‚ circular magnetic field around the wire. When two wires in an electrical circuit are placed close together‚ their magnetic fields are the exact opposite of each other. Thus‚
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| Two small spheres‚ each with mass m = 3.0 g and charge q‚ are suspended from a point by threads of length L = 0.22 m. What is the charge on each sphere if the threads make an angle = 15º with the vertical? | | A) 0.79 C B) 2.9 C C) 75 mC D) 6.3 C E) 0.11 C | | | | Three charges‚ each of Q = 3.2 10–19 C‚ are arranged at three of the corners of a 20-nm square as shown. The magnitude of the electric field at D‚ the fourth corner of the square‚ is approximately
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