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Concepts Of Physics MCQ Edition [Volume 2]PhysicsPhotoelectric Effect and Wave–Particle Duality

During an experiment on the photoelectric effect, no photocurrent is detected when the stopping potential is applied. This indicates that

Options

  1. Athe photoelectrons are emitted but get re-absorbed by the emitter metal
  2. Bthe emission of photoelectrons is halted
  3. Cthe photoelectrons accumulate close to the collector plate
  4. Dthe photoelectrons disperse from the sides of the apparatus

Correct answer

A. the photoelectrons are emitted but get re-absorbed by the emitter metal

Step-by-step solution

In a photoelectric effect experiment, the emission of photoelectrons from the metal surface depends solely on the frequency and intensity of the incident light. The applied potential difference does not affect the emission process. When a negative potential equal to the stopping potential is applied to the collector plate, it creates a retarding electric field. This field decelerates the emitted photoelectrons as they move towards the collector. At the stopping potential, even the photoelectrons with the maximum ki

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