motion control are called drives and employ any of the prime movers such as diesel or petrol engines gas or steam engines hydraulic motors and electric motors for supplying mechanical energy for motion control. Drives employing electric motors are known as Electrical drives. Fig 1.1 Block diagram of an Electrical Drive The advancement in electric drive system is very much related to the development in the power semiconductor devices technology. The introduction of the Silicon Controlled Rectifier
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SACE Stage 2 Physics Electric Fields 1 Solution 1. (a) State Coulomb’s Law. Any two point charges have acting on them equal sized oppositely directed forces acting along the line joining their centres. The magnitude of these equal sized forces is directly proportional to the product of the charges and inversely proportional to the square of their distance apart. The forces are attractive for unlike charges and repulsive for like charges. [pic]. e.g.
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Mini Case Study Can GE Remake Itself as a Digital Firm? General Electric (GE) is the world ’s largest diversified manufacturer. Fortune named GE "America ’s Most Admired Company" in 1998‚ 1999‚ and 2000. Jack Welch‚ GE ’s CEO and Chairman since 1981‚ is often cited as the most admired CEO in the United States. Headquartered in Fairfield‚ Connecticut‚ the company consists of 20 units‚ including Appliances‚ Broadcasting (NBC)‚ Capital‚ Medical Systems‚ and Transportation Systems. With the acquisition
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to let people know when to enter and also to research and learn more about parallel and series circuits. Introduction I am going to design an electric circuit for a Doctor’s surgery. There are two types of circuit’s Parallel circuit‚ and Series circuit. 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
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74 CREATIVITY AND INNOVATION MANAGEMENT Case Study: Jack Welch’s Creative Revolutionary Transformation of General Electric and the Thermidorean Reaction (1981–2004) Pier A. Abetti This case study draws a parallel between the French Revolution and the GE ‘revolution’‚ according to three waves of transformation. We discuss the ‘hard’ effects on GE employees (strategy‚ structure‚ employment‚ rewards) and the ‘soft’ effects (culture‚ work climate‚ indoctrination). In parallel with the French
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whether it is sustainable. General electric: Headquarters Fairfield‚ Connecticut‚ U.S. Revenue: US$ 182.515 billion (2008) Net income: US$ 17.410 billion (2008) Total assets: US$ 797.769 billion (2008) Employees: 323‚000 (2008) CEO & Chairman – Jeffrey R. Immelt Lines of business: Aviation‚ Jet engines‚ Electricity‚ Entertainment‚ Finance‚ Gas turbines‚ Generation‚ Industrial Automation‚ Lighting‚ Medical imaging equipment‚ Medical technology‚ Health informatics‚ Electric motors‚ Locomotives‚ Wind turbines
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6. To make the circuit “cold”‚ what do you need to do? WHY? Turn the resistance up and the voltage down. It completely stops the flow of electrons through the battery. Which means the battery is not able to work because there is no electric current being created. 7. Describe the relationship between voltage and
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Are electric cars better for the environment than gasoline ones? Nowadays‚ people all over the world do their best to live greener and not contribute to global warming. An invention that is meant to help reduce the amount of toxic waste that is polluting the environment nowadays is that of the electric car. But is electric really so much better than gas? Electric cars are emission free‚ compact and lightweight‚ and three times as efficient as gas engines.
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Electric string instruments use electrical signals and amplifiers to increase an instrument’s volume and modify its sound. Composers from all genres of music have used electric instruments in their compositions. While electric instruments more commonly appear in rock and popular music the classical composer George Crumb wrote a composition for electric strings entitled “Black Angels.” Electric string instruments are not the same as semi-acoustic instruments that use a mixture of sound boxes and electric
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Ch.9.1 – Types of Electric Charge * Static electricity : static cling of clothes out of dryer; lightning; * Walk across carpet and touch get a shock touching metal doorknob – friction of shoes against carpet cause you acquire static electric charge * Static charge – electric charge at rest‚ stays on and eventually discharged or lost to other objects/air * Discharge – remove excess static charge so the object is neutral * Static charge last long when air is dry * Electrostatics
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