A coil of Nichrome wire is 22.0 m long. The wire has a diameter of 0.400 mm and is at 20.0°C.
(a) If it carries a current of 0.520 A, what is the magnitude of the electric field in the wire?
(b) If it carries a current of 0.520 A, what is the power delivered to it?
(c) If the temperature is increased to 320°C and the potential difference across the wire remains constant, what is the power delivered?