Remember from Example pg 20-11 that the length of the wire is 150 m

The heater resistance was 12.1 W (again from the previous example)

 The total resistance is 12.1 + 1.27 = 13.37 W
I = V/R = 110/13.37 = 8.23 A
Power in the heater = I2R = 8.232(12.1) = 820 W

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