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  4. The number of electrons emitted by a surface exposed to light is directly proportional to:

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Q. The number of electrons emitted by a surface exposed to light is directly proportional to:

EAMCETEAMCET 1996

Solution:

According to the laws of Einsteins photo electric effect the number of photon emitted from the metal surface of the cathode is directly proportional to the intensity of incident light. As we increase of intensity of incident light the photo electric current increases, hence, no. of photons also increases.