A portion of Nichrome wire of radius 2.50 mm is to be used
in winding a heating coil. If the coil must draw a current of
9.25 A when a voltage of 120 V is applied across its ends,
find (a) the required resistance of the coil and (b) the
length of wire you must use to wind the coil.
RI = V
R = I/oA
The Attempt at a Solution
(a) RI = V
R = V/I = 120V/9.25A = 12.973Ohms
R = l/oA
l = RoA = (12.973Ohms)(.000001ohms*m)(.0025m*3.14*2) = 2.036761e-7m
The answer to the second part of the equation is 255m and I can't figure out what I did wrong...