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KCET2020ChemistryStructure of Atom

With regard to photoelectric effect, identify the correct statement among the following.

Options

  1. AEnergy of electron ejected increases with the increase in the intensity of incident light.
  2. BNumber of electron ejected increases with the increase in the frequency of incident light.
  3. CNumber of electron ejected increases with the increase in work function.
  4. DNumber of electron ejected increases with the increase in the intensity of incident light.

Correct answer

D. Number of electron ejected increases with the increase in the intensity of incident light.

Step-by-step solution

Photoelectric effect takes place when the rays of light falls on the surface of a metal with low ionisation energy, ejection of electrons from the surface of the metal takes place. The frequency of light being used, should be suitable. Also, the number of electrons emitted is directly proportional to the intensity of light but does not depend upon its frequency. However, the velocity of the emitted electrons is dependent on frequency of light used.

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