Physics-I question paper (AS 105) from BUTEX affiliated colleges' 2015 Level-1 Term-I finals, worth 105 marks. Problems cover fluid continuity and Torricelli's theorem, viscosity by Poiseuille's method, surface tension, elastic moduli, and moment of inertia.
Level-1 Term-I, Final Exám-2015
Subject: Physics-I (Code: AS 105)
Time: 3.0 Hrs. Full Marks: 105
(Use separate answer script for Part: A and Part: B)
(All parts of a question must be answered consecutively)
Part: A
(Answer any three questions)
1. (a) Define- angle of contact.
(b) Explain equation of continuity and find its differential form.
(c) State and prove Torricelli's theorem.
(d) Water flows through a horizontal pipe line of which the cross-section is not constant. The pressure is 1cm of Hg where the velocity is 35 cm/sec. Find the pressure at a point where the velocity is 65 cm/sec. Density of water = .
[1+7+6+3.5=17.5]
2. (a) Obtain an expression for determination of viscosity of a liquid by poisullis method.
(b) Derive an expression for the excess pressure inside a curved film.
(c) Define- surface tension. A capillary tube having diameter of and height of water is 0.04m. Calculate the surface tension of water. Density of water = .
[7+6+4.5=17.5]
3. (a) Define: (i) Breaking weight (ii) Stress.
(b) Show that the simple shear is equivalent to a compression and an extension at right angles to each other, each of value .
(c) What is elastic modulus? State the various types of elastic modulus.