**Resistors:**

I = V / R P = I

^{2}R

**Capacitors:**

_{C}

X

_{C}is the capacitive reactance = 1 / (2pfC)

f is the frequency, C is the capacitance

(Remember Voltage lags Current by 90

^{o})

**Inductors:**

_{L}

X

_{L}is the inductive reactance = 2pfL

f is the frequency, L is the inductance

(Remember Voltage leads Current by 90

^{o})