The correct answer is: C. photodiode
A photodiode is
a semiconductor device that converts light into an electrical signal. It is a type of photodetector, a device that converts light into an electrical signal. Photodiodes are used in many applications, including solar cells, light-emitting diodes (LEDs), and optical communication systems.A thermocouple is a device that converts heat energy into electrical energy. It is made of two dissimilar metals that are joined together at one end. When the two metals are heated, an electric current is generated. Thermocouples are used in many applications, including temperature measurement, power generation, and industrial process control.
A solar cell is a device that converts sunlight into electrical energy. It is made of a semiconductor material, such as silicon, that absorbs sunlight and creates an electric current. Solar cells are used in solar panels, which are used to generate electricity from sunlight.
A phototransistor is a semiconductor device that is similar to a transistor, but it is also sensitive to light. When light shines on a phototransistor,
it creates an electric current. Phototransistors are used in many applications, including light sensors, optical communication systems, and automatic door openers.E. None of the above is not the correct answer.