chassis of the circuit. | battery | | | Supplies electrical energy. A battery is more than one cell. Generates constant voltage. Represents a battery in an equipment package. | resister | | | A resistor restricts the flow of current‚ for example to limit the current passing through an LED. A resistor is used with a capacitor in a timing circuit. | attenuator | | | A box with input and control logic on one side‚ and output on the other. | capacitor | | | A capacitor stores electric charge
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which electrical current flows Electrocution Electrocution occurs when the amount or path of the current flowing through the individual becomes lethal Electrocution usually involves use of cord-connected equipment‚ contact with ground‚ and a moist or wet environment Electrical Terminology –electrical pressure Amperage –electrical flow rate Impedance –restriction to electrical flow (pipe friction) Circuit –path of flow of electricity Fault –current flow through an
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frequencies 2. Zero regulation (constant DC output voltage) for a wide range of AC line voltages and over the entire range of load currents that are required by the powered circuitry. 3. Zero power dissipation. 4. Instantaneous recover from changes in line voltage and load current. 5. Overload protection so that normal operation is automatically restored when the excessive current demand is removed. Power line disturbances and Sources of Power line Disturbance. Blackout - Sustained lack of AC line
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Student Exploration Circuits Vocabulary ammeter‚ circuit‚ current‚ electron‚ ohmmeter‚ Ohms law‚ parallel circuit‚ resistance‚ resistor‚ series circuit‚ voltage Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Strings of holiday lights can be designed in one of two ways. In some strings of lights‚ each light is connected to the others along a single wire (in series). In others‚ each light is attached to its own wire (in parallel). Suppose a single light bulb burns out. How do you think
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CLASS 10 ELECTRICITY 1. How much current will an electric heater coil draw from a 220 volt line‚ if the resistance of the heater coil is 40? (1 Mark) (Ans) Given‚ R= 40‚ V=220 V We have the relation‚ I = V/R = 220/40 = 5.5 A 2. What is electric current? (1 Mark) (Ans) The rate of flow of charge per unit time through a conductor is called electric current. 3. What is the SI unit of electric current? (1 Mark) (Ans) The SI unit of electric current is ampere. It is denoted by the letter
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foreign investments‚ by running down reserves or by receiving loans from other countries. While the overall BOP sheet will always balance when all types of payments are included‚ imbalances are possible on individual elements of the BOP‚ such as the current account. This can result in surplus countries accumulating hoards of wealth‚ while deficit nations become increasingly indebted. Historically there have been different approaches to the question of how to correct imbalances and debate on whether they
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IGNOU MBA MS-03 Solved Assignment 2013 ------------------------------------------------- Course Code : MS-03 ------------------------------------------------- Course Title : Economic and Social Environment ------------------------------------------------- Assignment Code : MS-03/TMA/SEM-I/2013 ------------------------------------------------- Coverage : All Blocks Note : Attempt all the questions and submit this assignment on or before 30th April‚ 2013 to the coordinator
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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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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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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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