Electrical Fundamentals

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March 7 , 2009

Introduction

The first discusses the difference between conductors semiconductors and insulators . The goes on to explain what is static electricity , the danger situations caused by static electricity and offers some and information on the origin of the static electricity in different environment is also highlighted . The gives some less known facts about the always present danger and illustrates static electricity , its dangers and consequences on aviation as well as preventive measures for

fire and explosion protection

Molecular structure of conductor , semiconductor and insulators

The difference between conductors , semiconductors and insulators lie in their molecular structure . Conductors are the best conductors of electricity while insulators do not conduct electricity at all under normal circumstances (Robertson , 2001 . The conductivity in the semiconductors is between that of insulators and the conductors . The molecules of different materials are made up of atoms . The atoms are made up of electrons which surrounds the nucleus of the atoms . There are two bands surrounding the nucleus which the electrons occupy . These are the conducting band and the non conducting band . The molecules in conducting materials have electrons in the conducting band . This makes it possible for the electrons to move freely making them good conductor of electricity . On the other hand the insulators have their electrons in the non conducting zone . In these materials also the gap between the two bands is very big . It therefore follows that this materials...