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The retarding potential for having zero photoelectron current

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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>Critical Thinking>Q 3
Light of frequency 1.5 times the threshold frequency is incident on photosensitive material. If frequency is halved and intensity doubled, then the photocurrent 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>Critical Thinking>Q 5
Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV. The minimum kinetic energy of the emitted photo-electrons will be
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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>Critical Thinking>Q 6
In photoelectric emission, the velocity of electrons ejected from near the surface 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>Critical Thinking>Q 7
The stopping potential for photoelectrons ejected from a photosensitive material of work function 1.6eV, when photons of energy 2.4eV are incident on it, 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>Critical Thinking>Q 8
What is the stopping potential when the metal with work function  0.6eV is illuminated with the light of 2 eV?
 
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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>Critical Thinking>Q 9
The threshold wavelength of a certain metal is 6600 A∘. The photoelectric work function for the metal will be h=6.6×10-34Js,c=3×108m s-1
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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>Critical Thinking>Q 10
Assertion: Work function of a metal is 5 eV. The maximum wavelength of photons required to emit electrons from its surface is 2480 A∘
Reason: Work function, ϕ0=hcλmax
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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 8
The threshold wavelength for lithium is 5250 A∘. For photoemission to take place, the wavelength of the incident light must be