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Question
The photocurrent in an experiment on photoelectric effect increases if ______.
Options
the intensity of the source is increased
the exposure time is increased
the intensity of the source is decreased
the exposure time is decreased
Solution
The photocurrent in an experiment on photoelectric effect increases if the intensity of the source is increased.
Explanation:
When the intensity of the source is increased, the number of photons emitted from the source increases. As a result, a large number of electrons of the metal interact with these photons and hence, the number of electrons emitted from the metal increases. Thus, the photocurrent in an experiment of photoelectric effect increases. The photocurrent does not depend on the exposure time. Hence, option (a) is correct.
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