ABSTRACT
In this chapter, we shall discuss diverse aspects of direct current [DC ] electric circuits. First, we consider how the connectedness of the components of a network dictates its overall properties. Earlier chapters strongly suggested that this was the case for networks comprised entirely of capacitors [Chapter 13] and resistors [Chapter 20]. Second, we develop a more realistic model of a battery, accounting for the observation that its supply voltage tends to decrease as its current drain increases. Third, we expose a serendipitous offshoot of this development, the notion of impedance matching, when we employ the improved battery in a simple resistive circuit. Finally, we quoteKirchoff’s Rules. These provide convenient expression of the energy and charge constraints in a form best suited for the determination of current responses.
