Materials Science and Engineering/Equations/Electronic Materials

Electrons

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Conductivity and Ohm's Law

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 : applied potential difference
 : length
 : electric field
  
  
 : average time between collisions (mean free time, relaxation time, collision time)
  
 : drift velocity
  
  
  
 : electric current density
 : multiply the drift velocity by the density of electrons
 : electrical conductivity