1. a nichrome wire 12 ft long and .011 inch diameter conducts 1.83A when 120v are applied. what is the resistivity of nichrome?
2. Copper windings of an electric motor at room temperature of 25 degrees C has resistance of .20(r). after running the motor, the resistance rises to .22(r). what is the temperature of the windings?
3.A) Determine the absolute zero resist. point of a metal if the wire is 50 (r) at 20 degrees C and 51.04 (r) at 150 degrees C.
B) Determine the metals?
4. A) A nichrome wire has 48 (r) at freezing. What is the resistance at the boiling point of water?
B) What is the temperature at which this wire has a resistance of 48.5 (r)?