Physics Lecture Notes

CMS COLLEGE OF engineering AND TECHNOLOGY COIMBATORE-641 032 DEPARTMENT OF PHYSICS Subject: ENGINEERING PHYSICS - II whole I CONDUCTING MATERIALS INTRODUCTION Materials net 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 crinkle to conduct or transmit heat, voltaical energy, or sound. Conductors ar materials that galvanical energy easily passes through, that do not resist the flow of electricity. Examples are 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: These materials conduct electricity with zero resistance below alteration temperature. 2. petty(a) resistivity 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. take shape Electrons: All the valence electrons in an isolated tinge are abjure to their parent nuclei are called as bo und electrons. 2. sluttish electro! ns: Electrons which excises emancipately 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 different and excessively with the positive ions. Since the motion is completely random, average speeding in any direction is zero. If a constant electric field is established inside a conductor, the...If you want to take off a full essay, order it on our website: OrderCustomPaper.com

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