Kirchhoff’s Voltage Law (KVL)

Chapter 6.2 Kirchhoff’s Voltage Law (KVL)

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

  • 6.2. KIRCHHOFF’S VOLTAGE LAW (KVL)179The large ”Helipot” unit is a laboratory potentiometer designed for quick and easy connec-tion to a circuit. The unit in the lower-left corner of the photograph is the same type of poten-tiometer, just without a case or 10-turn counting dial. Both of these potentiometers are preci-sion units, using multi-turn helical-track resistance strips and wiper mechanisms for makingsmall adjustments. The unit on the lower-right is a panel-mount potentiometer, designed forrough service in industrial applications.• REVIEW:• Series circuits proportion, or divide, the total supply voltage among individual voltagedrops, the proportions being strictly dependent upon resistances: ERn = ETotal (Rn /RTotal)• A potentiometer is a variable-resistance component with three connection points, fre-quently used as an adjustable voltage divider.6.2Kirchhoff’s Voltage Law (KVL)Let’s take another look at our example series circuit, this time numbering the points in thecircuit for voltage reference: