A 560-W heating coil designed to operate from 110 V is made of Nichrome wire 0.640 mm in diameter. (Assume p = 1.50 x 10- m, and a = 4.000 x 10(°C)- 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? W
A 560-W heating coil designed to operate from 110 V is made of Nichrome wire 0.640 mm in diameter. (Assume p = 1.50 x 10- m, and a = 4.000 x 10(°C)- 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? W
Chapter9: Current And Resistance
Section: Chapter Questions
Problem 17CQ: Resistors are commonly rated at 18W,14W,12W ,1 W and 2 W for use in electrical circuits. If a...
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![A 560-W heating coil designed to operate from 110 V is made of Nichrome wire 0.640 mm in diameter. (Assume
p = 1.50 x 10- m, and a = 4.000 x 10(°C)- 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?
W](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F59e2dca0-6438-4bed-b1be-82ee6a64cac8%2Fa59901ab-32d2-4850-bf8e-6008c4750f24%2F36u82.jpeg&w=3840&q=75)
Transcribed Image Text:A 560-W heating coil designed to operate from 110 V is made of Nichrome wire 0.640 mm in diameter. (Assume
p = 1.50 x 10- m, and a = 4.000 x 10(°C)- 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?
W
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