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Which of the following converts light energy to electric current?(a) LED(b) Zener diode(c) Photodiode(d) Solar cellThis question was addressed to me in an international level competition.I'd like to ask this question from Semiconductor Electronics in portion Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

Answer»

Correct choice is (c) Photodiode

For EXPLANATION I would say: A photodiode is a semiconductor device, which converts light ENERGY to electric energy. It is a special type p-n junction diode fabricated with a transparent window to allow light to FALL on the diode. Photodiodes are OPERATED in reverse BIAS.



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