Basic DC Theory DC CIRCUIT TERMINOLOGYTABLE 1Properties of Conducting Materialsr = ResistivityMaterialat20°C-cm-W/ft (a)Aluminum 17Carbon (b)Constantan 295Copper 10.4Gold 14Iron 58Nichrome 676Nickel 52Silver 9.8Tungsten 33.8(a) Precise values depend on exact composition of material.(b) Carbon has 2500-7500 times the resistance of copper.TemperatureCoefficientofResistanceTemperature coefficient of resistance, a (alpha), is defined as the amount of change of theresistance of a material for a given change in temperature. A positive value of a indicates thatR increases with temperature; a negative value of a indicates R decreases; and zero a indicatesthat R is constant. Typical values are listed in Table 2.Rev. 0 Page 17 ES-02
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business