In a p‐n junction photo cell, the value of the photo‐ electromotive force produced by monochromatic light is proportional to [2004]
A
the barrier voltage at the 
junction
junction
B
the intensity of the light falling on the cell
C
the frequency of the light falling on the cell
D
the voltage applied at the p‐n junction
Text Solution
Verified by ExpertsThe correct answer is:
B
When a light (wavelength sufficient to break the covalent bond) falls on the junction, new hole electron pairs are created. No. of produced electron hole pair depends upon no. of photons. So photo emf or current is proportional to intensity of light.
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