1. The problem statement, all variables and given/known data A series L-C-R circuit Comprises of a 250mH coil, 0.01 MFD capacitor and a 5W resistor. A dependent voltage defined by e = 2.5cos(80000t) is applied across it. Determine the power factor. 2. Relevant equations Power Factor = cos(x) = R/Z Z = sqrt^[R^2 + (XL - XC)^2] 3. The attempt at a solution Z = sqrt^[R^2 + (wL - 1/(wC))^2] , where w = angular frequency w = 1/sqrt^[LC] = 1/sqrt^[0.25H * 0.1MFD] Power Factor = 5W/Z This was where I came to. I'm having trouble most with the units. I do not know how to utilize a 5W resistor and I don't know what a MFD Capacitor is. At first I thought it could be a Mega-Ferrad, but I don't know how MFD converts to Capacitance. I believe my equation manipulation is correct if I can get those straightened out though.