Phase Angle in R, L & C
Inductors and Capacitors, or a combination of these and resistors in A.C. circuits have a phase angle - the current is out of phase with the voltage:
Resistance:
For a resistor the current and the voltage is in phase.
Inductance:
For an inductance Voltage leads Current by 90 degrees (p / 2 radians).
Capacitance:
For a capacitance Voltage lags Current by 90 degrees (p / 2 radians).
