A 500-W heating coil designed to operate from 110 V is made of Nichrome wire 0.500 mm in diameter.
(a) Assuming that the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used.
(b) What If? Now consider the variation of resistivity with temperature. What power will the coil of part (a) actually deliver when it is heated to 1 200°C?
This question was answered on: Jul 11, 2017
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