Chapter 3
DC circuits
In this chapter, we will learn how to analyse direct current (DC) circuits. The basic principle behind DC circuits is that they are time-invariant – they do not change. This means we can specify voltage and current values and assume that these will remain the same as long as the power supply to the circuit is connected, which differs from the alternating current (AC) circuits we will encounter later in the book. This chapter represents our first real introduction to electronic circuit analysis, where we will learn the basic equations and rules of series and parallel circuits. You may find the maths in the chapter examples takes a little time to work through (particularly for parallel circuits) but remember that the equations ...
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