


Electronic component are classed into either being Passive devices or Active devices.
By using schematics symbols we can represent reallife devices.
Resistance This is a resistance, measured in units ohms, . Most often it will be a resistor.
Inductor  A schematics symbol inserted into an electrical circuit to introduce a specified inductance.. Most often it will be a coil.
Inductance
The property of a circuit which impedes a change in current. Inductors are the usual source
of inductance. Inductance is measured in henrys. In electronic circuits, the usual measure of
inductance is henrys (H), milihenrys (mH) or microhenrys (µH), 1, 1e3 or 1e6 henrys
respectively.
or Capacitor  A schematics symbol inserted into an electrical circuit to introduce a specified capacitance.
Definition: The property of a circuit which impedes a change in voltage. Capacitors are the usual source of capacitance. Capacitance is measured in farads in honor of Michael Faraday. In electronic circuits, the usual measure of capacitance is microfarads (µF) or picofarads (pF), 1e6 or 1e12 farads respectively.This is a AC voltage source, with a voltage of , measured in units of volts, V. The most common AC Voltage Source you will see will be a home unit. .
A device inserted into an electrical circuit to introduce a specified alternating current (AC). An AC current has a magnitude, phase and frequency.
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