1. The problem statement, all variables and given/known data Find the voltage drop across a resistor and capacitor in parallel. I am trying to understand how to deal with this using complex numbers. I may have a completely wrong notion of complex impedance. I thought I could treat the complex impedance like resistance, then take the modulus or real part (I believe I know the math, but not which to apply). I= 100 milli Amps R= 1000 ohms C= 0.001Farads freq.= 60Hz=377rad/s 2. Relevant equations Z_c=1/(i*omega*C) R_eq= (R*Z_C)/(R+Z_C) 3. The attempt at a solution Do I apply the standard resistors in parallel formula then take the real part of the modulus? Or do I have a completely wrong conception on complex impedance.