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 nominate 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 phone line to conduct or transmit heat, voltaical energy, or sound. Conductors ar materials that electric automobileal energy easily passes through, that do not resist the flow of electricity. Examples atomic number 18 copper, aluminum, steel, silver, gold, electrolytes. Not in all materials conduct electricity evenly well. smorgasbord OF CONDUCTORS: Conducting materials are classified into three categories 1. Zero underground materials: These materials conduct electricity with zero resistance below passage temperature. 2. petty(a) immunity 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. jump out Electrons: All the valence electrons in an isolated tinge are abjure to their parent nuclei are called as bound electrons. ! 2. clean-handed electrons: Electrons which excises exculpately 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 early(a) and excessively with the positive ions. Since the motion is completely random, average f number in any direction is zero. If a constant electric field is established inside a conductor, the...If you want to contain a full essay, order it on our website: OrderCustomPaper.com

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