What component is identified by the symbol for a filament lamp?

The symbol for a filament lamp represents a light source. A filament lamp generates light when electric current passes through the filament, which heats up and emits light due to incandescence. This process directly indicates its primary function as a light source, which is evidenced in various applications, such as household lighting.

The other choices relate to different types of components or functions. For example, an energy converter might refer to devices that convert energy from one form to another, but a filament lamp specifically converts electrical energy into light energy. A current regulator controls the flow of electric current to ensure stability in circuits, which is not the primary role of a filament lamp. Similarly, a heat sensor detects changes in temperature, which isn’t applicable to the operation of a filament lamp. Hence, identifying a filament lamp with the function of being a light source accurately describes its primary purpose.