A) change in the frequency of light into a change in electric voltage
B) change in the intensity of illumination into change in photoelectric current
C) change in the intensity of illumination into a change in the work function of the photocathode
D) change in the frequency of light into a change in the electric current
Correct Answer: B
Solution :
In a photoelectric effect when monochromatic radiations of suitable frequency fall on the photo-sensitive plate called cathode, the photoelectrons are emitted which get accelerated towards anode. These electrons flow in the outer circuit resulting in the photoelectric current. Using the incident radiations of a fixed frequency, it is found that the photoelectric current increases linearly with the intensity of incident light as shown in figure. Hence, a photocell employs photoelectric effect to convert change in the intensity of illumination into a change in photoelectric current.You need to login to perform this action.
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