Nichrome wire is used in some radiative heaters. (a) Find the resistance needed if the average power output is to be 1.24 kW utilizing 120 V AC. x How is power related to the resistance and voltage? (b) What length of Nichrome wire, having a cross-sectional area of 4.90 mm², is needed if the operating temperature is 500°C? The resistivity of Nichrome at 20.0°C is 100 x 10-8 m and the temperature coefficient of resistivity is 0.4 x 10-3-1. m (c) What average power will it draw when first switched on? KW

Nichrome wire is used in some radiative heaters. (a) Find the resistance needed if the average power output is to be 1.24 kW utilizing 120 V AC. x How is power related to the resistance and voltage? (b) What length of Nichrome wire, having a cross-sectional area of 4.90 mm², is needed if the operating temperature is 500°C? The resistivity of Nichrome at 20.0°C is 100 x 10-8 m and the temperature coefficient of resistivity is 0.4 x 10-3-1. m (c) What average power will it draw when first switched on? KW

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

Nichrome wire is used in some radiative heaters.
(a) Find the resistance needed if the average power output is to be 1.24 kW utilizing 120 V AC.
X
How is power related to the resistance and voltage?
(b) What length of Nichrome wire, having a cross-sectional area of 4.90 mm², is needed if the operating temperature is 500°C? The resistivity of Nichrome at 20.0°C is 100 x 10-8 m and the temperature coefficient of resistivity is
0.4 x 10-³°C-1.
m
(c) What average power will it draw when first switched on?
kw

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