Question

The resistance of a coil copper wire at 20 degree celsius is 2.21 ohms. After a current of 10 amperes has been flowing in wire for two hours, the resistance of the coil was found o be 2.59 ohms. What is the temperature rise?
The Temperature Coefficient of Copper (near
room temperature) is +0.393 % per o
C. This
means if the temperature increases 1o
C the
resistance will increase 0.393%.

does that help?

Related Questions

(1) 45 micro coulombs of charge is passed through a wire in 35 seconds. How many electrons does this... How to do this problem? Compute the number of turns of wire on a coil whose resistance measures 1... a metal wire has a resistance of 8 Ohms at a temperature of 20 degrees. if the same wire has a resis... The field coil of a machine is wound with 700 turns of copper wire of cross sectional area 0,375mm^2...