BSc Physics SEM III 2022 2023 Oct 2023 PHYSICS I Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 Numbers indicate in the right hand side are marks
2. Q2 All questions are compulsory,
3. Q3 Use of non programmable calculator is allowed Select the correct option (12M)
4. Q1 In a system of two simple harmonic oscillator, if the motion of one affects the moiion of the other the system is said to 2)The highest velocity attained by a rocket is called 3)Efficiency of Carnot’s ideal heat engine is always
   • a) zero equal to | greater than | d) less than 4)In a carnot cycle, the working reservoir absorbs heat at a temperature
   • a) lower b) higher c) constant d) none of the mentioned 5)In Otto engine,heat is absorb at constant-— 6)Hydrogen and Helium at normal temperature show
5. Q1 B: Answer in one sentence. (3M) is Compound pendulum 2)Define Entropy 3)If Diesel and Otto engine have same compression ratio then which one is more efficient?
6. Q1 C:Fill in the blanks. (5M) of a system is ina reversible system 2)In Carnot’s heat engine, . is used as a working substance, 3)The efficiency of a Diesel engine can be greater than
7. Q4 Moment of force is called 5)Damping force acting on an oscillator depend on
8. Q2 A: Answer the following questions (any1) (8M) ) Write the equation of motion of the compound pendulum and obtained an expression for its time Write the equation of motion for rocket motion and derive an expression for maximum velocity attended by rocket
9. Q2 B: Answer the followivg (any!) (8M) ) Derive the expression for the total angular momentum of a system of particles about a point and show that when it holds for internal forces in a system of particles the angular momentum of the system is conserved
10. Q2 Derive the equation of motion of a lightly damped harmonic oscillator. Solve the equation for the VCD/ SYBSs. Sem-III Physics-1 Marks :100 3 Hours
11. Q2 C: Answer the following questions (4M)
12. Q1 Write the advantages of compound pendulum over a simple pendulum 2)Three particles in a system have position vectors in meters specified as and r3=i+j+k. If the masses of particles are 2 kg each, find the center of mass of the
13. Q3 A: Answer the following questions (anyl) (8M)
14. Q1 State and Prove Carnot’s theorem
15. Q2 Derive an expression for the change in entropy of perfect gas in terms of temperature and
16. Q3 B: Answer the following questions.(any1) (8M)
17. Q1 Derive an expression for efficiency of Carnot engine 2)Using TS diagram, obtain the expression for change in entropy in a reversible process
18. Q3 C :Answer the following questions.(any1) (4M)
19. Q1 A Carnot Engine, whose temperature of source is 400K takes 200 calories of heat at this temperature and reiects 150 calories of heat to sink. What is the temperature of the sink? Calculate efficiency of engine
20. Q2 An ideal heat engine operates according to Carnot’s cycle and receives 600 cal from heat source every cycle. The temperature of the heat source is 400 K and that of the sink 300K. Find The work done by the Carnot cycle and amount of heat rejected to the sink for the cycle Answer the following questions.(any 1) (8M)
21. Q1 Explain the construction and working of Diesel Engine
22. Q2 Drive the Clausius Clapeyron's latent heat equation,
23. Q4 B Answer the following questions.(any1) (8M)
24. Q1 Derive the general Maxwell relation
25. Q2 Explain the construction and working of Otto engine with neat diagram and derive the expression for efficiency
26. Q4 C Answer the following questions.(any1) (4M) 1)Derive the expression for power and efficiency in steam engine
27. Q2 State and explain with example the third law of thermodynamics
28. Q5 Answer the following questions. (any 4) (20M) 1)Define decrement and obtained the expression for it Distinguish between Otto engine & Diesel engine
29. Q3 A 100 gms of water is heated from to .Calculate change in entropy
30. Q4 A thin circular metal ring of radius 25 cm is suspended from a knife edge and made to oscillate
31. Q5 Explain Rankine cycle with the help of P-V diagram 6)Define Entropy. State and explain the principle of increase of entropy

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