PPT Slide
 
 
- E-field -> constant force on electrons
- Constant acceleration -> very large and increasing currents
- These very large currents and “funny” I(V) are not observed
- what’s wrong with this picture???
 
- A lot of rapid and random scattering  
- No constant acceleration (acceleration proportional to Voltage)
- Instead velocity of electrons is proportional to Voltage
Velocity proportional to current -> I=V/R
- Constant force on electrons -> constant acceleration
- For some reason simple constant acceleration isn’t happening….