Passive Components

Passive Components are electronic components that do not require a Source of Energy to perform their intended functions. The followings are the examples of Passive Components:

Resistors
They resist the flow of electric current. The resistance is measured in Ohms (Ω). R=V/I, where: R=Resistance, V=Voltage and I=Current.
Potentiometer
It is a resistor with a tap or contact which can be moved to change the resistance.
Capacitors
Capacitors store energy in its electric field. The capacitance is measured in Farads (F). C=Q/V, where: C=Capacitance, Q=Charge and V=Voltage. Capacitors stop direct current flow (DC). They are an open circuit to DC.
Variable Capacitors
The capacitance of these capacitors can be changed to adjust a circuit.
Inductors
Inductors store energy in its magnetic field. They are measured in Henrys (H). L=N，, where: L= Inductance, N=Numbers of Turns, and is the change in Flux linking a coil due to a change in Current through the coil.
Connectors
These connect one part of an electric circuit with another. Connectors are designed for different power levels and signal types.
Switches
Switches can be on-off controls (single throw) or change the connection from one circuit to another (double throw). Complex switches can control many circuits at the same time.
Relays
A relay is a switch that is turned on and off by an electromagnet, or a solid state switch controlled by an optical coupler.

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Last Modified Date: 10/3/2025