Electrical Resistance

Essay specific features

 

Issue:

Science

 

Written by:

Edgar M

 

Date added:

January 26, 2017

 

Level:

University

 

Grade:

B

 

No of pages / words:

15 / 4078

 

Was viewed:

10160 times

 

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Essay content:

What requires serious quantum mechanics is to understand where the energy levels come from and to describe large conductors with multiple energy levels. Before we get lost in these details (and we have the whole book for it!) it is useful to understand the factors that influence the current–voltage relation of a really small object...
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We start in college by learning that the conductance G (inverse of the resistance) of a large macroscopic conductor is directly proportional to its crosssectional area A and inversely proportional to its length L: G = ? A/L (Ohm’s law) where the conductivity ? is a material property of the conductor...
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