A spool of copper wire 230 m long and with a diameter of 0.320 mm is at 20.0°C. For copper, the resistivity is 1.70 x 100 m and the temperature confficient of resistivity is 3.9010 ( (a) What is the magnitude of the electric field (in V/m) in the wire if it cares a current of 0.450 A V/m (h) What is the electric power on W) delivered to the spool while it carries a current of 0.450 A7 (c) What is the power (in W) delivered to the spool if the potential difference across the wire is held constant and the temperature is increased to 370°C? W
A spool of copper wire 230 m long and with a diameter of 0.320 mm is at 20.0°C. For copper, the resistivity is 1.70 x 100 m and the temperature confficient of resistivity is 3.9010 ( (a) What is the magnitude of the electric field (in V/m) in the wire if it cares a current of 0.450 A V/m (h) What is the electric power on W) delivered to the spool while it carries a current of 0.450 A7 (c) What is the power (in W) delivered to the spool if the potential difference across the wire is held constant and the temperature is increased to 370°C? W
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Transcribed Image Text:A spool of copper wire 230 m long and with a diameter of 0.320 mm is at 20.0°C. For copper, the resistivity is 1.70 x 100 m and the temperature confcient of resistivity in 3.9010 (
(a) What is the magnitude of the electric field (in V/m) in the wire if it cares a current of 0.450 A
V/m
(h) What is the electric power (n W) delivered to the spool while it carries a current of 0.450 A7
W
(c) What is the power (in W) delivered to the spool if the potential difference across the wire is held constant and the temperature is increased to 370°C?
W
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