up a simple circuit to be able to read the voltage and current when the length of wire changes‚ so I then can work out the resistance. I will be using constantan wire starting of with 1m length and then decreasing it by 0.10m intervals down to 0.20m long. I will not go above 1m or below 0.20m because it may be too long that they resist so much current that the wire burns‚ or the length of the wire is so small that it doesn’t resist any current at all. The length of the wire will be changed by moving
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special characteristics of heater coil. 3. A wire of resistance 4 ohms is bent to form a circle. What is the resistance between two diametrically opposite ends? 4. How does the resistance of a conductor change if its temperature is increased? 5. A current of 4A flows in a wire of resistance 60 ohms. Calculate electrical energy consumed in 2 minutes. 6. V-I graph for two resistors is given. Which of the two has minimum resistance? 7. Alloys are used in electrical heating devices rather than pure metals
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Dc http://www.allaboutcircuits.com/vol_1/index.html ac http://www.allaboutcircuits.com/vol_2/index.html What is alternating current (AC)? Most students of electricity begin their study with what is known as direct current (DC)‚ which is electricity flowing in a constant direction‚ and/or possessing a voltage with constant polarity. DC is the kind of electricity made by a battery (with definite positive and negative terminals)‚ or the kind of charge generated by rubbing
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Procedure Part II: Ohm’s Law: Electricity‚ Magnets‚ and Circuits Ohm’s Law mA is milliamps‚ and 1000 milliamps equals one Ampere. Move the potential (volts) and resistance (ohms) sliders and observe the current (amps) As voltage increases‚ current increases. As resistance increases‚ current decreases. Fill out the tables below and check your work in the simulation. ( ½ pt each ) Remember‚ the simulation shows milliamps. You should show Amperes V = I * R 8.0 V 0.01 A 800
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LEVEL 2 UNITChapter 204 1 Principles of electrical science 11 Level 2 Electrical Installations (Buildings and Structures) This chapter covers: Chapter 1 the principles of electricity the principles of basic electrical circuits the principles of magnetism and electromagnetism the operating principles of a range of electrical equipment the principles of basic mechanics the principles of a.c. theory electrical quantities in Star Delta configurations. LO1 Matter – something that has weight
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Over the course of history‚ many figures have been compared as the best in their field. Both typically share the star light‚ however‚ a few do not. Nikola Tesla and Thomas Alva Edison were both champions of the power of electricity and hold over a thousand patents combined. Both men were responsible for designing the future of technology‚ although Tesla never reaped the rewards of doing so. Thomas Edison and Nikola Tesla both discovered‚ invented‚ and patented many new things‚ but both had very different
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immersed in a liquid bath. By applying an electrical current‚ a thin paint film forms over all the surfaces in contact with the liquid‚ including those surfaces in recessed portions of the body. The E-coat paint process deposits a thin paint film on the automotive body under the influence of a voltage gradient of about 200 to 300 volts. The water-based E-coat paint bath is conductive with an array of anodes that extends into the bath delivering a DC current. The paint film that forms has physical properties
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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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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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