Resistors - Resistance (R) measured in ohms (Ω)
A resistor impede the flow of current and impose a voltage reduction.
Capacitors - Capacitance (C) measured in farads (F)
Connected to a DC power source will accumulate a charge.
Inductors - Inductance (L) measured in henrys (H)
A component that allows current to flow in one direction. In the opposite direction it will try to block the current.