CBSE Class 12-science Answered
Distinguish between photo current and dark current.
Asked by Topperlearning User | 19 Jun, 2014, 14:11: PM
Expert Answer
When light of certain frequency reaches the p-n junction and if the energy of the photon is greater than the gap energy, the photon entering the junction breaks the covalent bond and produce electron -hole pair.The resulting current is called the photo current.
When there is no light the reverse saturation current flowing is called dark current.
Answered by | 19 Jun, 2014, 16:11: PM
Concept Videos
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Applications of pn Diode
Diode V-I characteristics Diode as a rectifier Special purpose diodes -
PN diode application
Diode V-I characteristics Diode as a rectifier Special purpose diodes. -
Applications of p-n Diode - Part 1
This video explains the diode in a forward and a reverse bias.
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