Question
When monochromatic radiation of intensity I falls on a metal surface, the number of photoelectrons and their maximum kinetic energy and N and T respectively. If the intensity of radiation is 2I, the number of emitted electrons and their maximum kinetic energy are respectively
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N and 2T
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2N and T
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2N and 2T
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N and T
Solution
B.
2N and T
i) Kinetic energy of photoelectrons depends on the frequency of incident radiations and is independent of the intensity of illumination.
ii) A number of photoelectrons depend upon the intensity.
So, the number of emitted electrons and their maximum kinetic energy are 2N and T respectively.
