The study and use of electrical devices that operate by controlling the flow of electrons or other electrically charged particles or by converting the flow of charged particles to or from other forms of energy.
Electronic circuitry.
A device or devices which require the flow of electrons through conductors and semiconductors in order to perform their function; devices that operate on electrical power (battery or outlet)
electrical power supply; specifically, electrical power provided by a utility (as a publicly-owned one); payment or bills for this.
hydroelectric power
hydroelectric
hydroponic