AIPMT PRELIMS 2006 Physics Photoelectric Effect MCQ Question
A photo-cell employs photoelectric effect to convert:
change in the frequency of light into a change in electric voltage
change in the intensity of illumination into a change in photoelectric current
change in the intensity of illumination into a change in the work function of the photocathode
change in the frequency of light into a change in the electric current
Correct Answer
Detailed Explanation
In a photo-cell, the photoelectric effect causes electrons to be emitted when light of sufficient frequency strikes the photocathode. The intensity of illumination affects the number of emitted electrons, thus changing the photoelectric current.
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