Domestic devices are powered either by a battery or by the a.c. mains. A battery transfers energy from its chemical store through the circuit. The mains supply transfers energy electrically from the power station to the home. In both cases the energy arrives at the device electrically and the device transfers it to a store that is useful.
In a heating device, such as a kettle, toaster or electric heater, the current passes through a heating element. The element has resistance, so energy is transferred to its thermal store and then to the surroundings or the water. Mains kettles and toasters work this way.
In a motor, the current makes a shaft spin, so energy is transferred to the kinetic store of the moving parts. A battery-powered toy car or drill transfers energy from the chemical store of the battery to the kinetic store of the wheels or drill bit. A mains vacuum cleaner or washing machine transfers energy from the mains to the kinetic store of its motor. Some energy is always wasted to the thermal store of the surroundings, and a hairdryer has both a motor and a heating element.