Physics Lecture Notes

CMS COLLEGE OF engineering science AND TECHNOLOGY COIMBATORE-641 032 DEPARTMENT OF PHYSICS Subject: ENGINEERING PHYSICS - II whole I CONDUCTING MATERIALS INTRODUCTION Materials advise be broadly classified into three types found on parcel outivity. They argon, 1. Conductors (Example: metals), 2. Semi conductors (Example: germanium, silicon) and 3. Insulators (Example: wood, mica, glass). CONDUCTORS: Conductivity is the ability or innovation to conduct or transmit heat, voltaical energy, or sound. Conductors be materials that voltaical energy easily passes through, that do not resist the flow of electricity. Examples argon copper, aluminum, steel, silver, gold, electrolytes. Not in all materials conduct electricity as well. smorgasbord OF CONDUCTORS: Conducting materials are classified into three categories 1. Zero electrical resistance materials: These materials conduct electricity with zero resistance below variation temperature. 2. petty(a) electric resistance materials: These materials have very high electrical conductivity. 3. full(prenominal) Resistivity materials: These materials have high resistivity and low temperature co-efficient of resistance. base Terminologies 1. articled Electrons: All the valence electrons in an isolated tinge are abjure to their parent nuclei are called as bound electrons. 2. submit electrons: Electrons which excises acquitly or randomly in all directions in the absence of external theater of operations. 3. Drift Velocity If no electric field is applied on a conductor, the free electrons move in random dire ctions. They collide with each other(a) and! excessively with the positive ions. Since the motion is completely random, average hurrying in any direction is zero. If a constant electric field is established inside a conductor, the...If you want to sign a full essay, order it on our website: OrderCustomPaper.com

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