Hi, I'm a very mature student and doing an course in Electrical engineering with no previous knowledge. I have a question which asks me to calculate the capacitive impedance in an a-c series circuit. The capacitor value is 200 microfarads, the frequency is 50 Hz and the resistor value is 2 Mohms. I have used the formula for Xc and found the Capacitive reactance to be 15.92 ohms. I then used the following to find the Impedance; Z = Sqr(R2 + Xc2) The answer that I got was 2 Mohms. Is this the correct method? The course is a home study course so I don't have easy access to a tutor. Any help would be very much appreciated.