negative potential

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  reachrkata

  If you recall your engineering, Potential at a point is defined as the work done to move a charge from infinity to the point. Since infinity never exists, all our definitions are actually potential differences.
  
  So any potential you measure is always with respect to a reference. So whether there is positive potential or negative potential is with respect to a reference.
  
  So strictly speaking there is no absolute negative or positive potential. Electrons always flow from a lower potential level to a higher potential level, and both of these could be positive based on your reference.
  
  -Karthik
  😕