Any radiation of appropriate wavelength fall on the depletion layer of a p-n junction develops a potential difference between the junction is working principle of
a) Hall effect sensor
b) Proximity sensor
c) Light sensor
d) All the above
Correct Answer: Option C
Photodiodes generates electric current whenever light of appropriate wavelength falls on the junction. These type of diodes are used as photodetectors or light sensors. (e.g) PIN diode, Avalanche photodiode.
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