A Level Physics Notes: Electricity – Phase Differences Between Current and Voltage for Resistors, Capacitors and Inductors
The voltage across a resistor and the current through a resistor are in phase.
The current though a capacitor leads the voltage across the
capacitor by
of
a cycle or
The
voltage across the capacitor is proportional to the charge on it.
Current must flow BEFORE the charge can start to increase.
The voltage across an inductor leads the current through an
inductor byof
a cycle orCurrent
through the inductor forces a back EMF which opposes the changing
current.
