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Which is the correct formula for the resistance Rt of a metallic conductor at any temperature t?(a) Rt = Ro(ɑt-1)(b) Rt = Ro(1-ɑt)(c) Rt = Ro(1+ɑt)(d) Rt = Ro(10+ɑt)The question was posed to me in class test.This intriguing question comes from Essential Parameters for Telemedicine in portion Telemedicine Technology of Biomedical Instrumentation

Answer»

Correct option is (c) Rt = RO(1+ɑt)

To EXPLAIN I would SAY: The resistance Rt of a metallic conductor at any temperature t is given by Rt = Ro(1+ɑt). Ro is the resistance at 0*C. ɑ is a temperature COEFFICIENT of resistivity.



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