Determination of Temperature Coefficient of Resistivity for some Metal Wire

Abstract

Resistance is the quality of a conductor which hinders the flow of electrons and the resistance a wire offers to a current depends on its material, its cross-sectional area, and length. However resistance also depends on the temperature, which increases with increasing temperature. Other than choosing an efficient materials there are a couple of simple thing that can be done to reduce the resistance of a conductor. Conductors have lower resistance at low temperatures. Keeping a conductor cool will help keep resistance low and reduces the amount of power lost conductor heating.

Tow metal wires (AL,Cu) has been prepared to study the thermal effect on this wire and the thermal coefficient has been calculated, also their resistances was calculated under variation oftemperature and concluded that the resistance increase with increasing temperature as considered in theoretical consideration. The Thermal conductivity was calculated to be 0.73(cal/cm.k.sec) for Al and 2.95 (cal/cm.k.sec) for cupper respectively which in agreement with the theoretical consideration that calculate by Handbook of Chemistry and Physics.