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The graph provided below represents the variation between the stopping potential and frequency in the photoelectric effect. What can be concluded from this graph?

Option: 1

The stopping potential is independent of the frequency of incident light.
 


Option: 2

The maximum kinetic energy of the emitted photoelectrons is dependent on the frequency of the incident light.
 


Option: 3

The work function of the material is inversely proportional to the frequency of the incident light.
 


Option: 4

The frequency of the incident light is directly proportional to the number of photoelectrons emitted.


Answers (1)

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From the graph provided, we can see that the stopping potential increases linearly with the frequency of incident light. Also the maximum kinetic energy of the emitted photoelectrons is dependent on the frequency of the incident light.

 . Therefore, option B is correct.

Option A is incorrect because the graph clearly shows that the stopping potential is dependent on the frequency of incident light.

Option C is incorrect because the work function of the material is related to the frequency of the incident light, as shown by the equation: h f=\phi+K E_{\max } .

Therefore, the work function is not inversely proportional to the frequency of the incident light.

Option D is incorrect because the number of emitted photoelectrons is dependent on the intensity of the incident light, not the frequency. The graph does not provide any information about the number of emitted photoelectrons. 

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Pankaj

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