MHT CET Physics question

Not in JEE Advanced syllabus

In a p-n junction photo cell, the value of photo-electromotive force produced by monochromatic light is proportional to

(A)The voltage applied at the p-n junction
(B)The barrier voltage at the p-n junction
(C)The intensity of the light falling on the cellCorrect
(D)The frequency of the light falling on the cell

Answer: (C)

Solution

The number of electron-hole pairs generated depends on the number of photons, i.e. on the intensity of the light, so the photo-emf varies with intensity;

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Question ID VK-085544