What is a transducer that conducts current when energized by light?

A transducer that conducts current when energized by light is best described by the term "Photoconductive Cell." This type of device is designed to change its electrical resistance based on the amount of light it receives. When light strikes the photoconductive material within the cell, it decreases in resistance, allowing it to conduct more electric current. This sensitivity to light makes photoconductive cells useful in applications such as light sensing, automatic lighting control systems, and various electronic devices.

The other options refer to different types of light-sensitive components. For instance, a light sensor is a broader term that encompasses any device that detects light but does not specifically refer to the operational mechanism of conducting current through changes in resistance. Photovoltaic cells, on the other hand, convert light energy directly into electrical energy through the photovoltaic effect rather than changing their resistance based on light. Lastly, a photoresistor, while similar to a photoconductive cell, typically refers to a specific type of resistive element that changes resistance in response to light, but the term itself is often used interchangeably with photoconductive cell. The distinction lies in the terminology and specific application, where the photoconductive cell is more precisely defined in the context of the