Which component in the photoelectric smoke detector is responsible for conducting electricity?

The component responsible for conducting electricity in a photoelectric smoke detector is the photoelectric cell. This cell operates by detecting changes in light intensity caused by smoke particles entering the detection chamber. When smoke enters, it scatters the light beam emitted by the internal light source, reducing the amount of light that reaches the photoelectric cell. This decrease in light intensity triggers the photoelectric cell, causing it to conduct electricity and activate the alarm. The interaction of smoke particles with the light beam is essential for the detection process, but it is the photoelectric cell that ultimately conducts electricity in response to the light changes.