D.C. Circuits. & Resistors in Series

Chapter 2 D.C. Circuits.

Fundamental Electrical and Electronic Principles Third Edition Book
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Summary of Contents

Fundamental Electrical and Electronic Principles Third Edition Book

  • D.C. Circuits Chapter 2 Learning Outcomes This chapter explains how to apply circuit theory to the solution of simple circuits and networks by the application of Ohm ’ s law and Kirchhoff’s laws, and the concepts of potential and current dividers. This means that on completion of this chapter you should be able to: 1 Calculate current fl ows, potential differences, power and energy dissipations for circuit components and simple circuits, by applying Ohm ’ s law. 2 Carry out the above calculations for more complex networks using Kirchhoff’s Laws. 3 Calculate circuit p.d.s using the potential divider technique, and branch currents using the current divider technique. 4 Understand the principles and use of a Wheatstone Bridge. 5 Understand the principles and use of a slidewire potentiometer. 31Resistors cascaded or connected in seriesor 2.1 Resistors in Series When resistors are connected ‘ end-to-end ’ so that the same current fl ows through them all they are said to be cascaded or connected in series . Such a circuit is shown in Fig. 2.1 . Note that, for the sake of simplicity, an ideal source of emf has been used (no internal resistance). EV1R1R2R3V2V3I Fig. 2.1