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The Figure shows a plot of photo current versus anode potential for a photo sensitive surface for three different radiations. Which one of the following is a correct statement?
image

  1. A
    curves (a) and (b) represent incident radiations of same frequency but of different intensities.
  2. B
    curves (b) and (c) represent incident radiations of different frequencies and different intensities.
  3. C
    curves (b) and (c) represent incident radiations of same frequency having same intensity.
  4. D
    curves (a) and (b) represent incident radiations of different frequencies and different intensities.

Solution & Step-by-step Explanation

From the principles of the photoelectric effect:Stopping Potential: Depends on the frequency of light. Since (a) and (b) have the same stopping potential, they have the same frequency.Saturation Current: Depends on the intensity of light. Since (a) and (b) have different saturation currents, they have different intensities.Thus, statement A is correct.

Practice this question

Try it yourself before checking the explanation above.

The Figure shows a plot of photo current versus anode potential for a photo sensitive surface for three different radiations. Which one of the following is a correct statement?
image
A
curves (a) and (b) represent incident radiations of same frequency but of different intensities.
B
curves (b) and (c) represent incident radiations of different frequencies and different intensities.
C
curves (b) and (c) represent incident radiations of same frequency having same intensity.
D
curves (a) and (b) represent incident radiations of different frequencies and different intensities.

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