Aircraft General Knowledge (021)

Electrics (021.09)

Common units for electrics:

DescriptionSymbolUnit (symbol)
Electrical Potential differenceU / VVoltage (V)
Electrical CurrentIAmpere (A)
Electrical ResistanceROhm (Ω)
Electrical Power
(work done)
Watt (W)

Ohm’s Law:

Resistance:

Resistors in series add together.

Resistors in parallel add together as the inverse of the individual resistance (1 / R)