Easy MCQ +4 / -1 PYQ · JEE Mains 2021

In a photoelectric experiment, increasing the intensity of incident light :

  1. A increases the number of photons incident and also increases the K.E. of the ejected electrons
  2. B increases the frequency of photons incident and increases the K.E. of the ejected electrons
  3. C increases the frequency of photons incident and the K.E. of the ejected electrons remains unchanged
  4. D increases the number of photons incident and the K.E. of the ejected electrons remains unchanged Correct answer

Solution

$\to$ Increasing intensity means number of incident photons are increased.<br><br>$\to$ Kinetic energy of ejected electrons depend on the frequency of incident photons, not the intensity.

About this question

Subject: Physics · Chapter: Dual Nature of Matter and Radiation · Topic: Photoelectric Effect

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