1. The bulb in the circuit represents the load.
2. A light bulb in a series circuit (a circuit used in the given pictures) is used to determine whether or not the electricity is flowing. Furthermore, the light bulb serves as the load. Wherein, the load is any device attached to an electrical circuit that is activated or energized by the flow of electricity to it. The load is the amount of electrical energy the device uses to complete its task.
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