Dear Editor: Through your papers I want to draw the attention of concerned authorities towards the worst condition of roads in Karachi. Almost all roads in Karachi are destroyed. This situation of roads is very dangerous for drivers. By this condition of roads loss of expensive vehicles and many horrible accidents are seen. Here no doubt roads are made but it also doomed very soon and the reason behind this is the use of inferior quality of material. Citizens of Karachi pay the vehicle tax
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4 Issues to Watch Out for When Charging Your Electric Car Excited about owning an electric car? You should be. Nonetheless‚ because you’ll need to charge it in order to use it‚ it’s worthwhile to be prepared for the following potential issues. Not All Charging Stations Are the Same The one thing you may miss about driving a vehicle with an internal combustion engine is that all gas stations are essentially the same. If you know how to fill up at one‚ you know how to fill up at all of them. Furthermore
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Case Analysis: The Early Bird – Electric Power Load Despatching The Early Bird – Electric Power Load Dispatching Electric utility firms have‚ for more than two decades‚ used marginal productmarginal cost concepts to generate and dispatch electric power in a more efficient‚ lowercost manner. Southern Company‚ the nation’s third largest utility‚ refers to its load dispatching method as the “Early Bird” system. Southern’s Early Bird is designed to provide automatic‚ computerized control of all
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1. In current differential protection the electric currents at all terminals of a protection zone are measured and their weighted sum must be equal to zero (generalized Kirchhoff’s current law). Thus the current differential protection function consists of measuring the sum of the currents and as long as it is zero or near zero no action is taken. In dynamic state estimation based protection‚ all existing measurements in the protection zone are utilized. These measurements include: currents and voltages
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C.D. Sanchez Instructor II. Theoretical Discussion Alternating currents and voltages Figure 1 shows the plot of alternating voltage and alternating current as a function of time in a circuit that has only a resistor and a source of alternating current — an ac generator. | | | | | | Figure 1 | Current and voltage from an ac source through a simple resistor. | | | Because the voltage and current reach their maximum values at the same time‚ they are in phase. Ohm’s
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Lesson Plan: Electric Circuits (~130 minutes) Concepts 1. Electricity is the flow of electric charge (electrons). 2. Electric Charge is a property of subatomic particles. 3. Current is the movement of electric charge. 4. Voltage is the electric potential that exists to move a charge. 5. Power is the rate at which electric energy is flowing in a circuit. 6. Ohm’s Law: Power = Voltage x Current. 7. Resistance is a physical property that quantifies how well a charge
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What is Magnetism? Properties of Magnets: Magnet: any material that attracts iron and materials that contain iron Magnets attract iron and materials that contain iron. magnets attract or repel other magnets. In addition‚ one part of a magnet will always point north when allowed to swing freely. Magnetic Poles: Magnetic Pole: any magnet with 2 ends‚ each is called a magnetic pole. Magnetic poles that are unlike attract each other and magnetic poles that are alike repel each other. Magnetic
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Electricity and Magnetism Electricity Circuit symbols Potential difference The energy which is delivered to an electric circuit comes from the supply. The greater the potential difference of the power supply the more energy is delivered. Potential difference is measured in volts‚ which has the unit symbol V. Cells in series The more chemical cells that are connected in series the greater the potential difference that they supply. The potential difference of a number of cells connected
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[pic] Module 5: Electricity by Jeremiah N. Junatas‚ June 2009 [pic] Table of Contents • The Electrical Nature of Matter • The Behavior of Electric Charges • Electric Fields • Electric Potential (Voltage) • Current ‚ Voltage‚ and Resistance [pic] A. The Electrical Nature of Matter All atoms are made up of protons‚ neutrons‚ and electrons. The classical model of the atom consists of a positively charged nucleus made up of protons and neutrons‚ and a number of
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Do Androids Dream of Electric Sheep? “Do Androids Dream of Electric Sheep?” is a science fiction novel written by Philip Kindred Dick‚ and it was published on 1968. Philip Kindred Dick is a famous American writer‚ who was born on December 16‚ 1928 and died on March 2‚ 1982 before completing his last unfinished work “The Owl in Daylight”. Philip K. Dick is best known for his many famous science fiction novels. Throughout his career‚ he wrote more than 40 novels and more than 120 short stories. Although
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