Which component is most commonly considered a load in household circuits?

• A. Battery
• B. Conductor
• C. Power source
• D. Light bulb

Answer: (D)

Loads are devices that consume electrical energy to do work. In home circuits, lighting is a common example of a load because a lamp or bulb uses electrical energy and converts it into light (and a bit of heat). A battery is a source of energy rather than something that uses energy. A conductor is just a path for current and doesn’t purposefully consume power. A power source is the supply that provides energy to the circuit, not a device that uses energy. Since a light bulb is the classic component that uses energy to produce light in household circuits, it’s the best example of a load.