9. Electrical terms, units, conditions and equipment

Explain (a) current, energy, power, resistance and voltage; (b) ampere (amps), ohms, volts, watts and watt-hours; (c) generating source with example, ground, open circuit, overvoltage, potential difference and short circuit; (d) the use of circuit, conductor, Ground Fault Circuit Interrupter (GFCI), insulator, inverter, rectifier, rheostat, substation, surge protection, solar panel, transformer, transmission and distribution systems, and wind turbine.