When an electric heater is turned on, the Nichrome heating element is at 0° C and draws a current of 14 A, with a potential difference of 120 V between the ends of the element. The element heats up to 730° 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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Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.