A toaster is rated as drawing 850 W of power at 120 V. The cord of the toaster is connected to an extension cord 8.00 m long. Assume the toaster has constant resistance. (a) If the resistance of each of the two conductors in the extension cord is r- 0.600 0, what is the actual power (in W) delivered to the toaster? (b) If the power must be at least 833 w for the device to operate, what must be the diameter of each of two identical copper conductors in the extension cord? (Enter the minimum diameter in mm.) mm (e) Repeat part (b), assuming the power is to be at least 842 w. (Enter the minimum diameter in mm.) mm

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A toaster is rated as drawing 850 W of power at 120 V. The cord of the toaster is
connected to an extension cord 8.00 m long. Assume the toaster has constant
resistance.
(a) If the resistance of each of the two conductors in the extension cord is
r = 0.600 0, what is the actual power (in W) delivered to the toaster?
W
(b) If the power must be at least 833 w for the device to operate, what must be
the diameter of each of two identical copper conductors in the extension
cord? (Enter the minimum diameter in mm.)
mm
(c) Repeat part (b), assuming the power is to be at least 842 w. (Enter the
minimum diameter in mm.)
mm
Transcribed Image Text:A toaster is rated as drawing 850 W of power at 120 V. The cord of the toaster is connected to an extension cord 8.00 m long. Assume the toaster has constant resistance. (a) If the resistance of each of the two conductors in the extension cord is r = 0.600 0, what is the actual power (in W) delivered to the toaster? W (b) If the power must be at least 833 w for the device to operate, what must be the diameter of each of two identical copper conductors in the extension cord? (Enter the minimum diameter in mm.) mm (c) Repeat part (b), assuming the power is to be at least 842 w. (Enter the minimum diameter in mm.) mm
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