Physics Lecture Notes

CMS COLLEGE OF technology AND TECHNOLOGY COIMBATORE-641 032 DEPARTMENT OF PHYSICS Subject: ENGINEERING PHYSICS - II whole I CONDUCTING MATERIALS INTRODUCTION Materials lot 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 solution to conduct or transmit heat, voltaical energy, or sound. Conductors atomic number 18 materials that voltaical energy easily passes through, that do not resist the flow of electricity. Examples ar copper, aluminum, steel, silver, gold, electrolytes. Not in all materials conduct electricity equally well. smorgasbord OF CONDUCTORS: Conducting materials are classified into three categories 1. Zero resistance materials: Th ese materials conduct electricity with zero resistance below conversion 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. bound Electrons: All the valence electrons in an isolated tinge are abjure to their parent nuclei a re called as bound electrons. 2. e! xcess electrons: Electrons which excises exemptly 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 directions. They collide with each former(a) and excessively with the positive ions. Since the motion is completely random, average swiftness in any direction is zero. If a constant electric field is established inside a conductor, the...If you want to determine a full essay, order it on our website: OrderCustomPaper.com

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