3581

Physics Current Electricity Level: University

Heating effect of current
Nichrome wire is used in some radiative heaters. (a) Find the resistance needed if  the average power output is to be 1.00 kw utilizing 120 VAC. (b) What length of nichrome wire having a cross section area of 5.00mm^2 is needed if the operating temp is 500 deg C. (c) What power will it draw when first turned on ?