Theory: Thevenin theorem states that any linear two-terminal circuit can be replaced by an equivalent circuit consisting of a voltage source VTH in series with a resistance RTH where * VTH is the open-circuit voltage at the terminals‚ and * RTH is the equivalent resistance seen thru the terminals provided that all the independent sources are turned off. Finding VTH: Determining the output voltage Vab in open-circuit condition (no load resistor meaning infinite resistance). This is
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basic electricity and electronics‚ you probably will not do well on the test. The Basic Electricity Test consists of 60 multiple-choice questions. Each question has four possible answers to choose from. Some questions refer to figures containing circuit diagrams or other schematics. These will be provided to you. Total testing time is approximately 60 minutes. In some locations‚ the test is given on a PC using a mouse. A tutorial is provided before the test that provides instructions on how to select
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terminal. b. As a + charge moves through the external circuit from A to D‚ it _____________ (gains‚ loses) potential energy and ______________ (gains‚ loses) electric potential. The point of highest energy within the external circuit is closest to the __+__ ( +‚ - ) terminal. c. Use >‚ <‚ and = signs to compare the electric potential (V) at the four points of the circuit. VA VB VC VD 4) The role of a battery in an electrical circuit can be described in three different ways. First‚ it
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power formula are limited to circuits in which electrical resistance is the only significant opposition to current flow including all DC circuits and AC circuits that do not contain a significant amount of inductance and/or capacitance. AC circuits that include inductance are any circuits that include a coil as the load such as motors‚ transformers‚ and solenoids. AC circuits that include capacitance are any circuits that include a capacitor(s). In DC and AC circuits that do not contain a significant
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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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gate The AND gate is a circuit which gives a high output (logic 1) if all its inputs are high. A dot () is used to indicate the AND operation. In practice‚ however‚ the dot is usually omitted. OR gate The OR gate is a circuit which gives a high output if one or more of its inputs are high. A plus sign (+) is used to indicate the OR operation. NOT gate The NOT gate is a circuit which produces at its output the negated (inverted) version of its input logic. The circuit is also known as an inverter
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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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STAMFORD UNIVERSITY BANGLADESH. LAB-REPORT COURSE CODE : EEE 458. COURSE TITLE : POWER SYSTEM PROTECTION LAB. PERFORMANCE DATE : 25.01.2010 SUBMISSION DATE : 13.02.2010 SUBMITTED TO : Mr. Shaikhul Arefin Khan. Lecturer‚ Department of EEE‚ Stamford University‚ Bangladesh. This report is Prepared on the base of Energypac study tour in Saver. POWER SYSTEM PROTECTION LAB
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But human-based data collection comes at great expense. Here is a low-cost microcontroller based visitor counter that can be used to know the number of persons at a place. All the components required are readily available in the market and the circuit is easy to build .Two IR transmitter-receiver pairs are used at the passage: one pair comprising IR transmitter IR TX1 and receiver phototransistor T1 is installed at the entry point of the passage‚ while the other pair comprising IR transmitter IR
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confirm the supply status at the origin of circuit or installation and then confirm if a supply exists local to the faulty circuit or equipment. If a supply is found to exist then it may be necessary to confirm that circuit or equipment can be isolated. This may require the completion of a ‘Permit to Work’ as part of the Safe System of Work process. 5 – Check Protective Devices The next stage is to look at the protective device of the circuit and determine if the device has activated
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