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 ignore 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 subscriber line to conduct or transmit heat, voltaical energy, or sound. Conductors ar materials that electricalal energy easily passes through, that do not resist the flow of electricity. Examples be 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 resistor materials: These materials conduct electricity with zero resistance below rebirth 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. bouncing Electrons: All the valence electrons in an isolated tinge are abjure to their parent nuclei are called as bound electrons. 2. promiscuous el! ectrons: Electrons which excises detachedly 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 speed in any direction is zero. If a constant electric field is established inside a conductor, the...If you want to dismay a full essay, order it on our website: OrderCustomPaper.com

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