BSc Physics SEM I 2022 2023 Dec 2023 PHYSICS II Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q2 All questions carry equal marks
2. Q1 A| Attempt any one of the following:
   • i) Explain how to determine the size of nucleus on the basis of Rutherford a- particle
   • ii) State and explain the law of radioactive disintegration. Derive necessary relation
3. Q1 B] Attempt any two of the following: {Each 5M
   • i) Write a note on “nuclear size and nuclear density”
   • ii) Determine: a) Radius b) Mass of copper nucleus, having atomic
   • iii) Define half -life period of radioactive sample. Show that of radium has half -life.time of the order 22 years. Find the time taken by a to decrease to 10%
4. Q2 Attempt any one of the following:
   • i) Q-value of the nuclear reaction. Obtain an expression for Q equation
   • ii) construction and working of proportional counter
5. Q2 B| Attempt any two of the following: [Each 5M]
   • i) Write shorts notes on the following: a) direct nuclear reactions. b) Elastic Scattering
   • ii) Write a short note on Bremsstrahlung process
   • iii) Explain the interaction between particles and matter
   • v) What is Geiger counter?
6. Q3 A] Attempt any one of the following: [10M]
   • i) State & explain de Broglie hypothesis & how de Broglie supports the Bohr quantization
   • ii) How are x-rays produced? List some important properties of x-rays VCD/ FYBSC SEM I PHYSICS-II 75 MARKS
7. Q3 B] Attempt any two of the following: [Each 5M]
   • i) Write a short note on Black body
   • ii) What is de Broglie wavelength associated with a proton moving with a velocity equal to 1/30" of the velocity of light? [Mass of kg]
   • iii) Write a short note on Theory of Black holes
   • iv) The first order Bragg reflection in a crystal takes place at glancing angle of 42) Calculate the angle for the second order Bragg reflection
8. Q4 Attempt aay three of the following: 5M}
   • i) Define: a) Binding energy packing fraction
   • ii) Using the given data find the B.E. of neutron in the 3Li’ nucleus. Express it in MeV and
   • iii) Define: nuclear fusion. Nuclear fission
   • iv) Find the energy released when two deuterium nuclei fuse to form alpha particle [Given: atomic mass of deuterium =2.014102 a.m.u., mass of helium =4.002603 a.m.u.] vy) An electron is moving along x-axis & its location is uncertain by m. Determine the uncertainty in the x- component of its momentum
   • vi) Describe single crystal Bragg —spectrometer

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