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

Questions asked in this paper

• it) figures to the right indicate full mavks

1. Q1 A] Attempt any one of the fellowing: 1)State and prove work energy theorem A body of mass m 1s suspended by two strings making and with the Find the expression for tensions in the strings a B Find magnitude: of tensions and T2 im the two strings 10 marks
2. Q1 B] Attempt any ovo of the following: {3 Marks each}
3. Q1 A cricket ball of mass 330g is moving with a velocity of and is hit by a bat so that the ball 1s turned back with a velocity of force of the blow acts for 0.()35s Find the average force exerted on the ball by the bar The force on point 50g ts F=151 it starts from rest. Find its position at 2 time 111) Explain the work done by constant force when the work done is and zero
4. Q1 Write advantages and disadvantages of friction
5. Q2 A] Attempt one of the following:
6. Q1 Show that for homogeneous isotropic material Y= For flowing through pipe of variable cross-section, Show that the of a flow are section varies inversely as the area of cross section of section
7. Q2 Attempt of the following: {5 Marks each} 10 marks
8. Q1 For a steel matenal, Y=2x10" and bulk modulus is 1.33x ratio and modulus of rigidity of the help of a diagram explain how will vou measure the speed of Efflux wire has modulus 1.2x10"N. is subjected to a stress of If the length of wire 1s 10m_Obtain the extension produced in it Define ratio Show that the theoretical values of poisson’s ratio are and
9. Q3 A] Attempt amy one of the following: 10 marks
10. Q1 Derive the expression for the work done by the system in the Adiabatic process )State the ideal gas equation. Discuss the Van der waals correction to the pressure and in terms of this equation VCD F.Y.B.Sc. Physics I Total Marks-75 Time-2:30 Hrs
11. Q3 B] Attempt any of the followiug: {5 Marks each} 10 marks
    • i) One mole of a perfect gas at undergoes isothermal expansion till the volume is doubled Calculate the work done by gas and heat absorbed.Given: State and prove Zeroth law of the thermodynamics iil) 2 moles of gas expands isothermally and reversibly from 20L to 30L at 300K.Find the work
    • iv)One mole of gas obeying Van der Waals equation at occupies of volume Calculate the pressure exerted by | R=8 Attempt any 3 of the following {5 Marks each} [15]
    • i) Explain the concept of free body diagram with illustration A is suspended from rigid support by and in extensible string OA of negligible mass The mass is pulled aside by a similar horizontal string AB until OA and with the vertical Show that tension in the string AB and OA are given respectively = mg tanO and T2 =mg ili) Define stress and strain write the SI unit and dimension of it
    • iv) A metal wire of length L and radius R is stretched assuming that the volume of the wire is unchanged show that poisson's ratio of material is calculate diameter of the molecules of a gas for which the Van der waals constant b is when referred to one cc of gas at NTP Explain the work is a path dependence

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