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Pune University - FY BSc PHYSICS - I, April 2010

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Total No. of Questions : 5] [Total No. of Pages : 3 [3717] - 3 P181 F.Y. B.Sc. PHYSICS - I Mechanics, Heat and Thermodynamics (Paper - I) (New Course) Time : 3 Hours] Instructions to the candidates : 1) All questions are compulsory. 2) Figures to the right indicate full marks. 3) Use of log table and calculator is allowed. 4) Neat diagram must be drawn wherever necessary. [Max. Marks : 80 Q1) Attempt all of the following : a) Define instantaneous speed and velocity. [2] b) What do you mean by inertia of the body. [2] c) State Pascal s law. [2] d) Calculate speed of bob of simple pendulum at its mean position, if the bob is to rise a maximum vertical height of 5 cm. [2] e) What is mean by reversible process? [2] f) What is equation of state? Give equation of state for perfect gas. [2] g) Give principle of resistance thermometer. [2] h) Find the coefficient of performance of Carnot s refrigerator working [2] between 227oC & 27oC. Q2) Attempt any four of the following : a) What is an average acceleration? Interpret average acceleration using V-t graph in one dimensional motion. [4] b) Explain the workdone. Obtain workdone by a constant force. [4] c) What is electromagnetic force? Give its properties. [4] d) A film of soap solution is formed in a metal ring of radius 1.5 cm. Find potential energy stored in the film, if surface tension of soap solution is [4] 0.035 J/m2. P.T.O.

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Additional Info : F.Y. B.Sc. PHYSICS - I : Mechanics, Heat and Thermodynamics (Paper - I) (New Course), Pune University
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