TAILIEUCHUNG - Electric Circuits, 9th Edition P9

Electric Circuits, 9th Edition P9. Designed for use in a one or two-semester Introductory Circuit Analysis or Circuit Theory Course taught in Electrical or Computer Engineering Departments. Electric Circuits 9/e is the most widely used introductory circuits textbook of the past 25 years. As this book has evolved over the years to meet the changing learning styles of students, importantly, the underlying teaching approaches and philosophies remain unchanged. | CHAPTER CONTENTS Resistors in Series p. 58 Resistors in Parallel p. 59 The Voltage-Divider and Current-Divider Circuits p. 61 Voltage Division and Current Division p. 64 Measuring Voltage and Current p. 66 Measuring Resistance The Wheatstone Bridge p. 69 Delta-to-Wye Pi-to-Tee Equivalent Circuits p. 71 Simple Resistive Circuits Our analytical toolbox now contains Ohm s law and Kirchhoffs BJECTIVES 1 Be able to recognize resistors connected in series and in parallel and use the rules for combining series-connected resistors and parallel-connected resistors to yield equivalent resistance. 2 Know how to design simple voltage-divider and current-divider circuits. 3 Be able to use voltage division and current division appropriately to solve simple circuits. 4 Be able to determine the reading of an ammeter when added to a circuit to measure current be able to determine the reading of a voltmeter when added to a circuit to measure voltage. 5 Understand how a Wheatstone bridge is used to measure resistance. 6 Know when and how to use delta-to-wye equivalent circuits to solve simple circuits. laws. In Chapter 2 we used these tools in solving simple circuits. In this chapter we continue applying these tools but on more-complex circuits. The greater complexity lies in a greater number of elements with more complicated interconnections. This chapter focuses on reducing such circuits into simpler equivalent circuits. We continue to focus on relatively simple circuits for two reasons 1 It gives us a chance to acquaint ourselves thoroughly with the laws underlying more sophisticated methods and 2 it allows us to be introduced to some circuits that have important engineering applications. The sources in the circuits discussed in this chapter are limited to voltage and current sources that generate either constant voltages or currents that is voltages and currents that are invariant with time. Constant sources are often called de sources. The de stands .

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