BSc Sem I 2023 2024 Dec 2024 PHYSICS I Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 B] Attempt any two of the following: {5 Marks each} [10] ‘
   • i)State laws of friction
   • ii) Explain Non-Inertial frame of reference
   • iii) The coefficient of static friction between the blocks of mass 4kg and the table (shown in figure) is =0.4. What should be the maximum value of ‘m’ so that the blocks do not move? The string and the pulley are light and smooth
   • iv) Write a short note on mass energy equivalence any one of the following: [10] inn i) Derive a relation between the young’s modulus, bulk modulus and poisson’s ratio of the
   • ii) State and prove Bernoulli’s theorem
2. Q2 B] Attempt any two of the following: {5 Marks each}
   • i) Define Poisson’s ratio. Show that the theoretical limiting values of Poisson’s ratio are -1
   • ii) State and explain law. What are its applications?
   • iii) A venturimeter consists of a pipe of diameter 36cm and a throat diameter of 20cm Estimate the rate of flow of water in m?/sec: if the water pressure in the pipe is 60000 pa and in the throat is 40000 pa [Given : density of water = 1000
   • iv) For a steel material, Y = 2x N/m? and bulk modulus is 13.3 X N/m’, calculate Poisson’s ratio and modulus of rigidity of steel VCD F.Y.B.Se. Physics I Time: 2hr 30 min Marks: 75 any one of the following: [10]
   • i)Prove that foe a real gases Cp-Cy
   • ii) Explain the concept of work. Derive the expression for work done in Adiabatic process
3. Q3 B] Attempt any two of the following: {5 Marks each} 10 marks
   • i) A perfect gas system at 2 atm pressure and temperature is adiabatically compressed to 1 atm pressure. Calculate the resulting temperature. (r=1.4) i i1) 2 moles of an ideal gas expands isothermally and reversibly from 20L to 30L at 300K.Find the work done. ( R=8.314 J/K.mol) ili) Distinguish between ideal and real gases
   • iv) State and explain the Zero’th laws of thermodynamics
4. Q4 Attempt any three of the following: {5 Marks each} 15 marks
   • i) Give advantage and disadvantage of friction
   • ii) A ball a dropped from a height reaches the ground with speed of gh .Calculate the work done by air friction
   • iii) Define Stress, Strain and Poisson’s ratio also write their units and dimensions
   • iv) Derive equation of continuity
   • v) One mole of gas obeying Van der waals equation at occupies of volume calculate the pressure exerted by it. a= 0.37 b=
   • vi) Imoles of a perfect gas expands isothermally at till its volume is doubled. Calculate the work done by the gas and heat absorbed by it. R=8.3 J/moleK

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