The resistance of a wire varies with temperature. Determine the temperature (in °C) at which the resistance of an iron wire will be a third of its value at 20°C. The temperature coefficient of resistivity for iron is 5.00 x 10-³(°C) -1 and is essentially constant over this temperature range. 320 X Can you express the resistance at any temperature as a function of the resistance Ro at To = 20°C, the resistivity, and the final temperature? How is the final resistance related to the resistance Ro at T = 20°C? Do you expect the final temperature to be less or greater than the initial temperature? °C
The resistance of a wire varies with temperature. Determine the temperature (in °C) at which the resistance of an iron wire will be a third of its value at 20°C. The temperature coefficient of resistivity for iron is 5.00 x 10-³(°C) -1 and is essentially constant over this temperature range. 320 X Can you express the resistance at any temperature as a function of the resistance Ro at To = 20°C, the resistivity, and the final temperature? How is the final resistance related to the resistance Ro at T = 20°C? Do you expect the final temperature to be less or greater than the initial temperature? °C
Chapter9: Current And Resistance
Section: Chapter Questions
Problem 65P: Digital medical thermometers determine temperature by measuring the resistance of a semiconductor...
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