• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Resistivity
Electric Circuit

Electrical Science Volume 1 of 4
Page Navigation
  82    83    84    85    86  87  88    89    90    91    92  
Basic DC Theory DC CIRCUIT TERMINOLOGY TABLE 1 Properties of Conducting Materials r = Resistivity Material at 20°C-cm-W/ft  (a) Aluminum 17 Carbon (b) Constantan 295 Copper 10.4 Gold 14 Iron 58 Nichrome 676 Nickel 52 Silver 9.8 Tungsten 33.8 (a)   Precise values depend on exact composition of material. (b)   Carbon has 2500-7500 times the resistance of copper. Temperature Coefficient of Resistance Temperature  coefficient  of  resistance,  a  (alpha),  is  defined  as  the  amount  of  change  of  the resistance of a material for a given change in temperature.   A positive value of a indicates that R increases with temperature; a negative value of a indicates R decreases; and zero a indicates that R is constant.   Typical values are listed in Table 2. Rev. 0 Page 17 ES-02







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.