Physics-I exam (PHY 101) from the 2022 Level-1 Term-I finals at BUTEX affiliated colleges. Questions include Bernoulli's theorem with venturimeter theory, Poisson's ratio bounds, modulus relations, viscous force calculations, and moment of inertia of discs.
Level-1 Term-I, Final Exám-2022
Subject: Physics-I (Code: PHY 101)
Time: 3.0 Hrs. Full Marks: 72
(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) State and explain Bernoulli’s theorem.
(b) Write the theory of a venturimeter and derive an expression for the role of flow a liquid through a pipeline.
(c) Water flows through a horizontal pipeline of varying cross-section at the rate of 0.2 m³/s. Calculate the velocity of water at a point where the area of cross-section the pipeline is 0.02 m².
[5+4+3=12]
2. (a) What is poisson’s ratio? Show that, the value of Poisson’s ratio lies between -1 to 0.5.
(b) Derive the relation, Y=2η(1+σ), where the symbols have their usual meanings.
(c) Show that, any types of strain work done per unit volume is equal to .
[4+5+3=12]
3. (a) What is coefficient of viscosity?