Collection Technique .......................................................................... Cahier technique no. 158 Calculation of short-circuit currents B. de Metz-Noblat F. Dumas C. Poulain Building a New Electric World "Cahiers Techniques" is a collection of documents intended for engineers and technicians‚ people in the industry who are looking for more in-depth information in order to complement that given in product catalogues. Furthermore‚ these "Cahiers Techniques"
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obedience was actually somewhat higher. (para. 28) When the teachers were given the choice of what level to shock the learners for giving the wrong answer‚ the average shock was less than 60 volts. Three of 40 subjects did not go over the lowest voltage‚
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control winding. Once saturated‚ the inductance of the saturable reactor drops dramatically. This decreases inductive reactance and allows increased flow of the AC current. II. Function/Operation Figure 1. This scheme controls the output voltage by varying the impedance of a saturable reactor as shown in diagram. This scheme is simple in concept and has a good line transient rejection. The drawbacks of this technique include slow response (10 cycles)‚ high output impedance which gives high
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DC is used in reference to voltage whose polarity never reverses. Frequency - is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency‚ which emphasizes the contrast to spatial frequency and angular frequency. The period is the duration of one cycle in a repeating event‚ so the period is the reciprocal of the frequency. Impedance- is the measure of the opposition that a circuit presents to a current when a voltage is applied. In quantitative
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GRAPHS § § § § § § Elements – line segments in a graph that represent network components. Nodes – the terminals of the line segment. Incident node and element – if the node is terminal of the element. Graph – shows the geometrical interconnection of the elements of a network. Subgraph – any subset of elements of a graph. Path – a subgraph of connected elements with no more than two elements connected to any one node. § Connected graph – if and only if there is a path between every pair of nodes.
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Aim To measure voltage and current in the circuit and from that figure work out emf and internal resistance of the cell‚ to identify errors involved and deal with them in the most effective way and maintain a safe working environment at all times. Background EMF (electromotive force) is a measure of work done per unit of charge and is measured in volts. Internal resistance is resistance in ohms of the cell. I will be using a 1.5V battery in the experiment. I will measure the voltage and current using
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5 Effect of Temperature 5 Components of Electrical Circuits 6 Components of an Electric Circuit 7 Measuring Current‚ Voltage and Resistance 8 Measuring voltage 8 Measuring current 9 Measuring resistance 9 Ohm’s Law‚ Electricity 10 Definition of Ohm 11 Unit of resistance is ’ohm’ 11 Statement of Ohm’s Law 11 Ohm’s law : Current 13 Ohm’s Law : Voltage 13 Ohm’s Law : Resistance 13 Ohm’s Law : Formula Transformation 14 Electric Power and Its Derivation 15 DC POWER:
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laws laboratory Abstract: The purpose of this lab is to verify the Ohm’s Law‚ Kirchhoff’s Voltage and Current Laws. As well as the introduction to the voltage division. The Ohm’s Law states that the current through a conductor between two points is directly proportional to the potential difference across the two points (V = IR). The Kirchhoff’s Voltage Law states that the directed sum of the electrical voltage around any closed network is zero. The Kirchhoff’s Current Law states that the algebraic
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TENS 2146 Electric Devices and Measurements Lab 3 Current and Voltage This report was prepared by: L. Wall Fall 2009 Prof. R. Alba-Flores Team Members: J. White‚ L. Wall Conducted on: September 17‚ 2009 Submitted on : September 24‚ 2009 Abstract: In this lab students experimented with light emitting diodes. The student built a basic circuit with two LED’s and resistors in parallel. The results showed that the voltage is the same in parallel. The items that were in series had the
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process of circuit design begins with the specification‚ which states the functionality that the finished design must provide‚ but does not indicate how it is to be achieved. The initial specification for this project is a dc voltmeter with an input voltage range of 0 to 300 volts. Although there are many parameters that a design specification should contain‚ such as size‚ weight‚ moisture resistance‚ temperature range‚ thermal output‚ vibration tolerance and acceleration tolerance but we shall only
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