Textile Physics-II question paper (YME 329) from BUTEX affiliated colleges' 2021 Level-3 Term-I finals. Covers dielectric constants, static charge theories, yarn diameter and linear density relations, contraction factor numericals, Peirce model proofs, and drape coefficients.
Level-3 Term-I, Final Exám-2021
Subject: Textile Physics-II (Code: YME 329)
Time: 2.0 Hrs. Full Marks: 70
(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) What is dielectric Properties? Derive the equation of dielectric constant.
(b) Write shortly the theories of static electricity.
(c) Explain the methods of minimizing static problems.
(d) Write the effects of moisture on dielectric properties.
[6+5+4+2.5 = 17.5]
2. (a) Define static electricity. How does static charge build up?
(b) State the various hypothesis of charge transfer from one body to another.
(c) Explain the terms conductors, semiconductors and insulators.
[4+6+7.5 = 17.5]