5
CHAPTER
Direct-Current Circuit Analysis
IN THIS CHAPTER, YOU’LL LEARN MORE ABOUT DC CIRCUITS AND HOW THEY BEHAVE UNDER VARIOUS conditions. These principles apply to most AC utility circuits as well.
Current through Series Resistances
In a series circuit such as a string of light bulbs connected to a DC battery (Fig. 5-1), the current at any given point equals the current at any other point. In this situation, we connect an ammeter A between two of the bulbs. If we move the ammeter to any other point in the current path, it will indicate the same current. This uniformity of current holds true in any series DC circuit, no matter what the components are, and regardless of whether or not they all have the same resistance.
5-1 Light bulbs in ...
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