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From the following graph of photocurrent against collector plate potential, for two different intensities of light I1 and I2, one can conclude

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Important Questions on Electrons and Photons

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Electrons and Photons>Competitive Thinking>Q 18
The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6eV fall on it is 4eV. The stopping potential in volts is  
 
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Electrons and Photons>Competitive Thinking>Q 19
The maximum kinetic energy of the photoelectrons depends only on
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Electrons and Photons>Competitive Thinking>Q 20
Einstein's photoelectric equation states that Ek=hv-ϕ. In this equation Ek refers to

 
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Electrons and Photons>Competitive Thinking>Q 21
The energy of gamma ( γ ) ray photon is Eγ and that of an X-ray photon is Ex. If the visible light photon has energy of Ev , then we can say that 
 
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Electrons and Photons>Competitive Thinking>Q 22
According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is 
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Electrons and Photons>Competitive Thinking>Q 23
Light of wavelength λ  which is less than threshold wavelength is incident on a photosensitive material. If incident wavelength is decreased then stopping potential will
 
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Electrons and Photons>Competitive Thinking>Q 24
In a photocell, frequency of incident radiation is increased by keeping other factors constant v>v0, the stopping potential 
 
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 11 - Electrons and Photons>Competitive Thinking>Q 25
Following graphs shows the variation of stopping potential corresponding to the frequency of incident radiation (F) for a given metal. The correct variation is shown in the graph v0=Threshold frequency)                                                                                                                                                            Question Image