Department of Physics - Dr.Zakir Husain College, Ilayangudi.
Atomic And Nuclear Physics –4BPH4C1
Time: 3 Hours Max Marks: 75
Part – A (10 x 2 = 20)
Answer All the Questions
2. Write note on photoelectric cell.
3. Give Pauli’s exclusion principle.
4. Define Bohr Magneton.
5. State Mosley’s Law.
6. What is a unit cell?
7. What are the limitations of cyclotron?
8. Define Half Life.
9. Write note on Van Allen Belts.
10.What are Baryons?
Part – B (5 x 5 = 25)
Answer All the Questions
11. Discuss Aston’s mass spectrograph and explain how isotopes are detected.
(OR)
Explain the theory of determining e/m of photo-electron using Lenard’s method.12. Explain the various quantum numbers associated with the vector atom model..
(OR)
Explain emission of D2 lines in sodium spectrum using term symbols and selection rules.13. State and derive Bragg’s law. Explain the working of Bragg spectrometer.
(OR)
Draw NaCl structure and discuss it.14. Explain how electrons are accelerated to very high energy by betatron.
(OR)
Write a note on thermo nuclear reactions15. Discuss the method of radio carbon dating.
(OR)
Explain latitude effect in cosmic rays.
Part – C (3 x 10 = 30)
Answer any three Questions
16. Explain Frank and Hertz Experiment to determine critical potential.
17. Describe Stern and Gerlach experiment and indicate the importance of the results obtained.
18. Describe the quantum treatment of normal Zeeman Effect.
19. Explain the construction and working of a GM counter.
20. Write an essay on the nuclear reactor