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Photovoltaic cells need an external electrical supply to function.(a) True(b) FalseI have been asked this question in an online interview.I need to ask this question from Photoelectric Transducers topic in portion Physiological Transducers of Biomedical Instrumentation

Answer»

Right choice is (b) False

To explain: Photovoltaic cells are very ROBUST in construction, need no external ELECTRICAL supply and produce a photocurrent sometimes stronger than other photosensitive elements. TYPICAL photocurrents produced by these cells are as high as 120 mA/lumen. At constant temperature, the current SET up in the cell usually shows a linear relationship with the incident light intensity.



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