Medium MCQ +4 / -1 PYQ · JEE Mains 2023

From the photoelectric effect experiment, following observations are made. Identify which of these are correct.

A. The stopping potential depends only on the work function of the metal.

B. The saturation current increases as the intensity of incident light increases.

C. The maximum kinetic energy of a photo electron depends on the intensity of the incident light.

D. Photoelectric effect can be explained using wave theory of light.

Choose the correct answer from the options given below :

  1. A A, B, D only
  2. B A, C, D only
  3. C B, C only
  4. D B only Correct answer

Solution

(A) From Einstein's equation <br/><br/> $K_{\max }=e V_{s}=h v-\phi$ <br/><br/> Form the stopping potential $\left(\mathrm{V}_{\mathrm{s}}\right)$ depends on $\phi$ $\& \,v$. <br/><br/> (B) Saturation current is proportional to intensity, i.e., number of incident photons. <br/><br/> (C) $K_{\max }$ only depends on nature of photon and $\phi$. <br/><br/> (D) Einstein used particle behaviour of photon to explain photon electric effect. <br/><br/> Only B is correct.

About this question

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

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