work with direct current (DC) that still impacts society. Despite this‚ Nikola Tesla has impacted the world through his work with alternating current (AC)‚ which are used to supply power to homes‚ and his creation of the first hydroelectric power plant. Thomas Edison made a monumental impact with his alteration of the electric light bulb‚ although he did not invent it himself. Tesla and Edison raced to prove that their type of current was more effective‚ in the “War of Currents‚” which is still
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Global Remittances 1. Where are remittances across borders included within the balance of payments? Are they current or financial account components? • The United States Bureau of Economic Analysis (BEA)‚ which is responsible for the compilation of U.S. balance of payments statistics‚ classifies migrant remittances as "current transfers" in the current account. • Wider definitions of remittances may also include capital assets which migrants take with them to host countries‚ and similar assets which
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answer sheets. 1 Electric cells store electrical energy. 2 A bulb in a circuit will light up once it is connected to one end of a battery. 3 When the resistance of a circuit increases‚ the current flows around the circuit will become smaller. 4 Two fuses rated 15 A connected in series allow a current larger than 30 A to flow through them. 5 The live wire in a plug is blue in colour. B Multiple-choice questions (20 marks‚ 2 marks each)ġ Choose the correct answer for each of the following
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operate using vibration energy sources other than the standard charging mechanisms. As most of latest mobile phones are capable of charging from Universal Serial Bus (USB) we decided to design our circuit capable of supplying standard USB voltage and current rating. The circuit consists of a piezoelectric buzzer‚ a rectifier with a storage capacitor‚ an amplifier section‚ regulator and a switching mechanism that controls the energy flow into the battery. Experimental results showed that the method is
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A GUIDE TO BUILDING CIRCUITS and USING A MULTIMETER TO MEASURE RESISTANCE‚ VOLTAGE‚ AND CURRENT PART A: USING THE BREADBOARD TO BUILD A CIRCUIT The "breadboard" consists of a block of white plastic with two sets of five rows of holes. Each set of rows looks like . . . . . . . . . . . . . . . . . . etc. . . . . . . . .
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Console is the section of the imaging system that most Technologists are familiar with. It is the Primary side of the main circuit and it includes the incoming current‚ the exposure switch‚ the autotransformer and the primary winding for the step up transformer. Through the Control Console‚ the tech is able to control the x-ray tube current and the voltage so that the useful x-ray beam that reaches the patient has the right quantity‚ or the intensity of the beam and is expressed in mR/mAs‚ and the
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Burner Flame Out · Street Light Control · Position Sensor *LDR has a disadvantage that when its temperature changes‚ its resistance changes drastically for a particular light intensity. 2 AIM & APPARATUS AIM: To study the variations‚ in current flowing in a circuit containing a LDR‚ because of a variation:(a) In the power of the incandescent lamp‚ used to ‘illuminate’ the LDR. (Keeping all the lamps at a fixed distance). (b) In the distance of a incandescent lamp‚ (of fixed power)‚
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Wire Symbols Electrical Wire Conductor of electrical current Connected Wires Connected crossing Not Connected Wires Wires are not connected Switch Symbols and Relay Symbols SPST Toggle Switch Disconnects current when open SPDT Toggle Switch Selects between two connections Pushbutton Switch (N.O) Momentary switch - normally open Pushbutton Switch (N.C) Momentary switch - normally closed DIP Switch DIP switch is used for onboard configuration SPST Relay Relay open
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to develop electricity. His name was George Westinghouse‚ and he was very interested in alternating current. Edison bought Tesla’s ideas‚ and developed an AC system that lit up the 1893 Chicago World’s Fair. Three years later an AC system began turning the energy of Niagara Falls into electricity. Before that Edison relied only on direct current which only went up to one mile while alternating current went over one hundred miles. Soon Tesla‚ who proudly became an American citizen in 1891‚ was one
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Questions and Problems: 1. Describe the type of meter movement used in analog meters. The current in the circuit is used in basic meters to measure the voltage drop or current in the circuit. The current passes through the coils of wires‚ which is then magnetized. Inside the apparatus‚ there is also a permanent magnet which opposes the magnetic field of the magnetized coil of wire that is connected to the pointer therefore‚ as we see in meters‚ the pointer moves. There is also a spring connected
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