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MHT CET202519 Apr 2025Morning ShiftPhysicsDual Nature of MatterActual

In a photoelectric experiment, if the intensity of incident light is doubled and the frequency is kept slightly greater than threshold frequency, then the saturation photoelectric current

Options

  1. Aremains constant
  2. Bis halved
  3. Cis doubled
  4. Dbecomes four times

Correct answer

C. is doubled

Step-by-step solution

The photoelectric effect yields electron emission when incident light exceeds a material's threshold frequency. For a given material and frequency above threshold, the number of photoelectrons emitted per second is directly proportional to the incident light intensity. The saturation photocurrent represents the maximum current when all emitted electrons reach the collector. Doubling the intensity doubles the photoelectron emission rate, which consequently doubles the saturation current. The correct answer is (C) .

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