A 360-W heating coil designed to operate from 110 V is made of Nichrome wire 0.510 mm in diameter. (Assume p = 1.50 x 10-6 n. m, and a = 4.000 x 10(°C)-1 for Nichrome.) (a) Assuming the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used. m (b) Now consider the variation of resistivity with temperature. What power is delivered to the coil of part (a) when it is warmed to 1 200°C?
A 360-W heating coil designed to operate from 110 V is made of Nichrome wire 0.510 mm in diameter. (Assume p = 1.50 x 10-6 n. m, and a = 4.000 x 10(°C)-1 for Nichrome.) (a) Assuming the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used. m (b) Now consider the variation of resistivity with temperature. What power is delivered to the coil of part (a) when it is warmed to 1 200°C?
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Transcribed Image Text:A 360-W heating coil designed to operate from 110 V is made of Nichrome wire 0.510 mm in diameter. (Assume p = 1.50 x 10-6 2. m, and a = 4.000 x 10-4(°C)-1 for Nichrome.)
(a) Assuming the resistivity of the Nichrome remains constant at its 20.0°C value, find the length of wire used.
(b) Now consider the variation of resistivity with temperature. What power is delivered to the coil of part (a) when it is warmed to 1 200°C?
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