27. In a p − n junction photocell, the value of the 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 cell
(d) the frequency of the light falling on the cell
Answer : (c) the intensity of the light falling on the cell
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