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MHT CET202617 April 2026Evening ShiftPhysicsDual Nature of MatterActual

In photoelectric effect, keeping the frequency of incident radiation and accelerating potential fixed, if the intensity of incident light is increased,

Options

  1. Athe photoelectric current increases.
  2. Bthe kinetic energy of emitted photoelectrons increases.
  3. Cphotoelectric current decreases.
  4. Dkinetic energy of emitted photoelectrons decreases.

Correct answer

A. the photoelectric current increases.

Step-by-step solution

In the photoelectric effect, the intensity of incident light is directly proportional to the number of photons incident per unit area per unit time. Increasing the intensity of the incident light increases the number of photons striking the metal surface per second. Since the frequency of the incident radiation is kept fixed, the energy of each individual photon ( E = h ) remains constant. Therefore, the maximum kinetic energy of the emitted photoelectrons ( K_ max = h - ) does not change. However, a larger number

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