CBSE Class 12 Physics Modern Physics Solved Examples

CBSE Class 12 Physics Modern Physics Solved Examples. Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks.

Ex.1 In a head on collision between an α-particle and gold nucleus, the closed distance of approach is 41.3 fermi. Calculate the energy of α particle.

Ex.2 Light of wave length 5000 Å falls on metallic plate with photoelectric work function = 1.90 eV. Find
(a) energy of the photon in eV (b) kinetic energy of the photoelectrons emitted
(c) stopping potential

Ex.3 What will be de-Broglie wavelength of an electron having kinetic energy of 500 eV.

Ex.4 An X-ray tube produces a continuous spectrum of radiation with its short wavelength end 0.65 Å. What is the maximum energy of a photon in the radiation?

Ex.5 Threshold wavelength for photoelectric emission in metallic silver is λ = 3800 Å. Ultra-violet light of λ = 2600 Å is incident on a silver surface. Calculate
(a) work function
(b) maximum kinetic energy of the emitted photoelectrons
(c) maximum velocity of the photo electrons

Please click on below link to download pdf file for CBSE Class 12 Physics Modern Physics Solved Examples.