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

N and 2T

2N and T

2N and 2T

N and T

Answer

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.