Building simple resistor circuits

Chapter 5.8 Building simple resistor circuits

Lessons In Electric Circuits Volume I – DC Book
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Lessons In Electric Circuits Volume I – DC Book

  • 5.8. BUILDING SIMPLE RESISTOR CIRCUITS155numerical figures is something I like to call qualitativeanalysis. In other words, we will beanalyzing the qualitiesof the effects in a circuit rather than the precise quantities. The result,for you, will be a much deeper intuitive understanding of electric circuit operation.• REVIEW:• To determine what would happen in a circuit if a component fails, re-draw that circuitwith the equivalent resistance of the failed component in place and re-calculate all values.• The ability to intuitively determine what will happen to a circuit with any given compo-nent fault is a crucialskill for any electronics troubleshooter to develop. The best way tolearn is to experiment with circuit calculations and real-life circuits, paying close atten-tion to what changes with a fault, what remains the same, and why!• A shortedcomponent is one whose resistance has dramatically decreased.• An opencomponent is one whose resistance has dramatically increased. For the record,resistors tend to fail open more often than fail shorted, and they almost never fail unlessphysically or electrically overstressed (physically abused or overheated).5.8Building simple resistor circuitsIn the course of learning about electricity, you will want to construct your own circuits usingresistors and batteries. Some options are available in this matter of circuit assembly, someeasier than others. In this section, I will explore a couple of fabrication techniques that willnot only help you build the circuits shown in this chapter, but also more advanced circuits.If all we wish to construct is a simple single-battery, single-resistor circuit, we may easilyuse alligator clipjumper wires like this: