#electrical_energy__electricity  energy made available by the flow of electric charge through a conductor; "they built a car that runs on electricity"
  supertype:  energy  (physics) the capacity of a physical system to do work; the units of energy are joules or ergs; "energy can take a wide variety of forms"
  subtype:  alternating_current__alternatingcurrent__AC  an electric current that reverses direction sinusoidally; "In the US most household current is AC at 60 cycles per second"
  subtype:  direct_current__DC  an electric current that flows in one direction steadily
  subtype:  signal.electrical_energy  an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes

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