3. The resistance of a carbon coil is 10.5 SN at 60 °C. At what temperature will its resistance decrease to 65 percent if its temperature-coefficient of resistance at 14 °C is 0.00756 °C-1? 4. A...

Extracted text: 3. The resistance of a carbon coil is 10.5 SN at 60 °C. At what temperature will its resistance decrease to 65 percent if its temperature-coefficient of resistance at 14 °C is 0.00756 °C-1? 4. A copper wire has a length of 3500 ft and having an area of 144 cm squared. Find the resistance of the copper conductor at a temperature of 43ºC.