In a temperature-resistance curve of a metal (such as copper) the resistance gradually increases with the increase of temperature. Temperature has a profound effect on resistance and hence it is important that we determine a method to find the resistance at any temperature within the limit of operation. Although the temperature-resistance curve is not a straight line, we draw a best fit straight line to find the resistance at normal operating temperature range.
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| Figure: Temperature-Resistance curve of copper and inferred absolute zero temperature. |
Although the actual curve extends to absolute zero (-273.15�C, or 0 K), the straight-line approximation is quite accurate for the normal operating temperature range.
Mr. Muhammad Saqib, M.Sc. (PAK), Research Fellow (PAK), a member of IEEE, is a Fulbright Alumnus and earned his Master’s Degree in Electrical and Power Engineering from University Of Engineering And Technology Taxila, PAKISTAN.
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