Transcription of Temperature coefficient of resistivity
{{id}} {{{paragraph}}}
Temperature coefficient of resistivity )]TT(1[oo + = )]TT(1[RRoo += T0 = reference Temperature = Temperature coefficient of resistivity , units of( C)-1 For Ag, Cu, Au, Al, W, Fe, Pt, Pb: values of are ~3-5 10-3 ( C)-1 Tslope = )]TT(1[RRoo +=Example: A platinum resistance thermometer uses thechange in R to measure Temperature . Suppose R0 = 50 at T0=20 C. for Pt is 10-3 ( C)-1 in this Temperature is R when T = C?R = 50 [1 + 10-3 ( C)-1 ( C)] = Temperature coefficient of resistivityExample: A platinum resistance thermometer has aresistance R0 = at T0=20 C. for Pt is 10-3( C)-1.
eliminate resistive losses •Superconducting magnets with much stronger magnetic fields than normal electromagnets. More recently: As the field has advanced, materials with higher values of T c get discovered 21.3. 21.4: Electrical Conduction: A Microscopic View Re-cap: Microscopic motions of charge carriers are random, v of ~ 106 m/s; ...
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document:
{{id}} {{{paragraph}}}