JEE Questions for Physics Dual Nature Of Radiation And Matter Quiz 21 - MCQExams.com

If kinetic energy of free electron is made double, change in de-Broglie wavelength will be............

  • Physics-Dual Nature of Radiation and Matter-68561.png
  • 2)
    Physics-Dual Nature of Radiation and Matter-68562.png

  • Physics-Dual Nature of Radiation and Matter-68563.png

  • Physics-Dual Nature of Radiation and Matter-68564.png
Photoelectric effect is obtained on metal surface for a light having frequencies f1 & f2 where f1 > f2 . If ratio of maximum kinetic energy of emitted photo electrons is 1 : K , so threshold frequency for metal surface is...............

  • Physics-Dual Nature of Radiation and Matter-68565.png
  • 2)
    Physics-Dual Nature of Radiation and Matter-68566.png

  • Physics-Dual Nature of Radiation and Matter-68567.png

  • Physics-Dual Nature of Radiation and Matter-68568.png
Energy of α - particle having de - Broglie wavelength 0.004 Å is...................
  • 1280 eV
  • 1200 eV
  • 1200 MeV
  • 1200GeV
Assertion : Photo-electric can take place only with an electron bound in the atom.
Reason : Electron is Fermion and photon is boson.
  • Both Assertion and Reason are true and Reason is correct explanation of Assertion
  • Both Assertion and Reason are true, but Reason is not correct explanation of Assertion.
  • Assertion is true but the Reason is false.
  • Both Assertion and Reason is false.
Read the paragraph carefully and select the proper choice from given multiple choices. According to Einstein when a photon of light of frequency f or wavelength λ is incident on a photo sensitive metal surface of work function Ø . Where Ø < hf (here h is Plank\'s constant) then the emission of photo-electrons place takes place. The maximum K.E. of emitted photo electrons is given by Kmax = hf – Ø . If the there hold frequency of metal is f0 then hf0 = Ø .
Stopping potential of emitted photo-electron is = ...........V.
  • 0.413
  • 0.825
  • 1.32
  • 1.65
Each of the following questions contains statement given in two columns, which have to be matched. The answers to these questions have to be appropriately doubled . If the correct matches are A - q, s, B - p, r, C- q, s and D - s then the correctly doubled matrix will look like the one shown here :
  • A → q, s B → p, r C → q, s D → q, s
  • A → p, s B → q, r C → q, s D → q, s
  • A → q, r B → p, q C → r, s D → p, s
  • A → q, s B → q, r C → r, s D → q, s
0:0:1


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