📚 FYUG (NEP) previous year question papers solution
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FYUG 1st semester Physics DSC 102 Previous Year Question Papers Solutions
UNIT 5
2019
(FYUG PHY-DSC102 Same as CBCS PHҮНСС–102T )
1. Define proper time interval. Explain why a moving clock appears to go slow to а stationary observer.
2. Discuss the motivation behind Michelson-Morley experiment.
3. Show that whatever velocity be combined with velocity of light, the resultant is always the velocity of light.
4. A particle has a lifetime of 10-7 s when measured at rest. How far does it go before decaying if its speed is 0.99c when created?
5. Show that the rest mass of a particle of
momentum p and kinetic energy T is
m= p²c² - E² /2Tc²
6. Discuss briefly one experiment in support of time dilation in STR.
7. State the fundamental postulates of STR. Explain the variation of mass with velocity with the help of a graph.
2020
(FYUG PHY-DSC102 Same as CBCS PHҮНСС–102T )
8. State postulates of special theory of relativity..
9. Write the aim of Michelson-Morley experiment.
10. What do you mean by mass-energy equivalence?
11. Write a short note on time dilation.
12. Find an expression for expected fringe shift in Michelson-Morley experiment.
13. Derive Lorentz transformation equations.
2021
(FYUG PHY-DSC102 Same as CBCS PHҮНСС–102T )
14. Show that the length is invariant under Galilean transformation.
15. State the postulates of special theory relativity.
16. Write a short note on relativistic time dilation.
17. What is the meaning of mass-energy equivalence? Obtain Einstein's mass-energy relation. Show that 1 a.m.u. = 931 MeV.
18. Describe the Michelson-Morley experiment and explain the physical significance of the negative result.
2023
(FYUG PHY-DSC102 )
19. What do you mean by mass-energy equivalence?
20. What do you mean by massless particle? Find the velocity of such particle.
21. What is the aim of Michelson-Morley experiment?
22. On the basis of Lorentz transformation equation, discuss the phenomenon of time dilation.
23. Describe Michelson-Morley experiment.
24. State the fundamental postulates of the theory of special theory of relativity. Explain in brief, what you mean by length contraction.
25. Explain reference frames and Galilean transformations. Prove that when u is much smaller than the velocity of light, Lorentz transformations reduce to Galilean transformations.
2024
(FYUG PHY-DSC102 )
26. Write down Galilean transformation equations.
27. State the postulates of special theory of relativity.
28. What do you mean by length contraction?
29. Derive Lorentz transformation equations.
30. Show that
L = L0 √(1 − v2/c2)
where the symbols have their usual meanings.
31. Obtain the expression of relativistic addition of velocities.
32. Obtain Einstein's mass-energy relation. Show that the rest mass of photon is zero.
CBCS PYQ SAME AS FYUG PHYSICS DSC 102
| CBCS PHYHCC-102 Question Paper 2019 | Click Here |
| CBCS PHYHCC-102 Question Paper 2020 | Click Here |
| CBCS PHSHCC-102 Question Paper 2021 | Click Here |
FYUG PYQ PHYSICS DSC 102
| FYUG PHYSICS DSC 102 Question Paper 2023 | Click Here |
| FYUG PHYSICS DSC 102 Question Paper 2024 | Click Here |
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