BSc Physics SEM II 2015 16 2015-16 ATKT PHYSICS I Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q2 Figures right indicate full marks
2. Q3 Use of calculators are allowed @-1 A) Answer the following:- (any one) 8
3. Q1 State and explain Newton’s laws of motion poisseulle’s law for a liquid flowing in a narrow tube. State the assumptions made
   • B) Answer the following:- (any one) 7
4. Q1 For a homogeneous isotropic material show that
5. Q2 Define the following :
   • i) Limiting friction
   • ii) Co-efficient of friction
   • iii) Angle of friction
   • iv) Angle of repose
   • C) Answer the following:- (any one)
6. Q1 Define strain. State its types
7. Q2 block of mass m kg is placed on an incline plane of an angle @ . The angle 6 is adjusted such that the block moves downward with constant speed. Determine the angle 6 terms of co-efficient of friction
   • A) Answer the (anyone)
8. Q1 Treating air as a perfect gas, derive an expression for the change of atmospheric temperature with the height above sea level
9. Q2 Prove that, for a real gas, Show that it reduces to R for a perfect gas
   • B) Answer the following:- (any one) 7
10. Q1 Discuss the concept of internal energy and obtain first law of thermodynamics. Discuss path dependence of heat energy
11. Q2 Obtain relations between p, V and T is an adiabatic interaction for a perfect gas Answer the following:- (any one) 5
12. Q1 Calculate the temperature drop over 1km of the atmosphere if r = 1.4 for air and the average molecular weight of air is 0.029 kg/mole R = 8.4 J/mole K and g = 9.8 m/s’
13. Q2 Show that (34) Kr
    • A) Answer the following:- (any one) 8
14. Q1 Show that the function y = f, (x + vt) + f, + vt) represents the general solution of the one
15. Q2 Write short notes on :
    • i) Reverberation
    • B) Answer the following:- (any one) 7
16. Q1 Describe piezoelectric oscillator and explain how ultrasonic waves are produced by it
17. Q2 Which of the following functions are solutions to the one dimensional wave equation
    • i) Q, where P and Q are constants
    • ii) y =x? + where v= velocity of wave iv)
    • C) Answer the following:- (any one) 5
18. Q1 The auditorium volume is The wall area is the floor area is 180m’ and the ceiling area is The average sound absorption coefficient for the walls is 0.028, for the ceiling is 0.65 and for the floor is 0.06. Calculate the average sound absorption coefficient and the reverberation time
19. Q2 Draw sketch of naturally found quartz crystal, its cross section showing the optical axis, electrical axis and mechanical axis
    • Q.P. Code :
20. Q1 has sound absorbing surface of 750m? and average absorption coefficient 0.504. Calculate the reverberation time
21. Q2 Define the following:
    • i) Viscosity ii) Co-efficient of Viscosity
22. Q3 isothermal curve and an adiabatic curve are plotted on the same p — v plane, show that the adiabatic is steeper than the isothermal at a common point (p, v)
23. Q4 What are the units and dimensions of stress, strain, poisson’s ratio and modulus of Find the wavelength of audible acaustic waves for the following values for air medium;
24. Q6 Certain quantity of a perfect gas at NTP is compressed adiabatically to one fourth of its original volume. Calculate the resulting pressure and temperature (r = 1.4)

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