MCQ on Photoelectric Effect - Part-2 | LS Sir

MCQ on Photoelectric Effect
multiple choice questions on Photoelectric Effect

MCQ on Photoelectric Effect - Part-1 | LS Sir
   • MCQ on Photoelectric Effect - Part-1 | LS Sir  

MCQ on Photoelectric Effect - Part-2 | LS Sir
   • MCQ on Photoelectric Effect - Part-2 | LS Sir  

MCQ on Photoelectric Effect - Part-3 | LS Sir
   • MCQ on Photoelectric Effect - Part-3 | LS Sir  

MCQ on Photoelectric Effect - Part-4 | LS Sir
   • MCQ on Photoelectric Effect - Part-4 | LS Sir  

*Link of Photoelectric Effect
   • Photoelectric Effect  

*Link of Compton Effect
   • Compton Effect  

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Q11. For the photoelectric effect in sodium, the figure shows the plot of cut-off voltage versus frequency of incident radiation. The threshold frequency is

Q12: In a photoelectric experiment for 4000 Å incident radiation, the potential difference to stop the ejection is 2 V. If the incident light is changed to 3000 Å, then the potential required to stop the ejection of electrons will be

Q13. The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces A and B. The graphs demonstrate that A's work function is:

Q14. When monochromatic radiation of intensity I falls on a metal surface, the number of photoelectrons and their maximum kinetic energy are N and T respectively. If the intensity of radiation is 2I what is the number of emitted electrons and their maximum kinetic energy?

Q15. The number of photo-electrons emitted per second from a metal surface increases when:

Q16. The work function of lithium is 2.5 eV. The maximum wavelength of light that can cause the photoelectric effect in lithium is

Q17. Light of wavelength 3500 Å is incident on two metals A and B. Which metal will yield more photoelectrons if their work functions are 5 eV and 2 eV respectively?

Q18. If in a photoelectric experiment, the wavelength of incident radiation is reduced from 6000 Å to 4000 Å, then:

Q19: The maximum wavelength of radiation that can produce photo-electric effect in a certain metal is 200nm. The maximum kinetic energy acquired by electron due to radiation of wavelength 100 nm?

Q20: The stopping potential value is 0.6 V when the light source is kept at a distance of 20 cm. When the source is kept at 40 cm away, the stopping potential will be

Q21: If the work function for a certain metal is 3.2 x 10-19 joule and it is illuminated with light of frequency 8 x 1014 Hz. The maximum kinetic energy of the photo-electrons would be (h= 6.63 x 10-34 Js).

Q22: A photocell is receiving light from a source placed at a distance of 1m. If the same source is to be placed at a distance of 2 m, then the ejected electron

Q23: The minimum energy required to remove an electron is called

Q24. Identify the conclusion of the photoelectric experiment from the following.

Q25. What is the relation between the interaction parameter, ‘b’, and atomic radius, R, for the Photoelectric effect?