3. How resistance and resistivity get effected by temperature. If there is iron wire at room temperature of 20 oC and then you increased its temperature to 50 degrees Celsius, what would be its change in resistance and resistivity if its original resistance is 20 ohm and resistivity is 10 ohm m. The temperature coefficient of iron is 5.0*10^-3 per oC.

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A: Given data: The resistance R =187.4 ft.  Resistance thermometer R=164.2 ft  Temperature T= 20°C…

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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.