A portion of Nichrome wire of radius 2.60 mm is to be used in winding a heating coil. If the coil must draw a current of 9.90 A when a voltage of 120 V is applied across its ends, find the following. (Take the resistivity of nichrome to be 1.50 10-6 Ω · m.)
(a) the required resistance of the coil
(b) the length of wire you must use to wind the coil
(C) A 0.700-V potential difference is maintained across a 1.50-m length of tungsten wire that has a cross-sectional area of 0.600 mm2. What is the current in the wire?