Part 2 The temperature variation of resistance is given by R = Ro + Roa(T – To) where R is the resistance at temperature Tand Ro is the resistance at temperature To (often taken to be 0°C to 20°C repectively). (1) What is a? What are the units of a? (2) Solve for a algebraically. (3) Some thermometers use the resistance of a material to measure temperature. A resistance thermometer made from some material has a resistance of 64.3 Q at 22.5°C. When the thermometer is heated, the resistance becomes 139.1 Q. If a = 0.00498 (units omitted due to question (1)), what is the temperature of the material?

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.