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When an electric heater is turned on, the Nichrome heating element is at 0° C and draws a current of 15 A, with a potential difference of 120 V between the ends of the element. The element heats up to 797° C, with the potential difference constant. Find the final current. (The temperature coefficient of resistivity of Nichrome is 4.0 10-4 (°C)-1.)

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