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2 definitions found
 for potential difference
From WordNet (r) 3.0 (2006) :

  potential difference
      n 1: the difference in electrical charge between two points in a
           circuit expressed in volts [syn: electric potential,
           potential, potential difference, potential drop,
           voltage]

From The Free On-line Dictionary of Computing (18 March 2015) :

  voltage
  potential difference
  
      (Or "potential difference", "electro-motive
     force" (EMF)) A quantity measured as a signed difference
     between two points in an electrical circuit which, when
     divided by the resistance in Ohms between those points,
     gives the current flowing between those points in Amperes,
     according to Ohm's Law.  Voltage is expressed as a signed
     number of Volts (V).  The voltage gradient in Volts per metre
     is proportional to the force on a charge.
  
     Voltages are often given relative to "earth" or "ground" which
     is taken to be at zero Volts.  A circuit's earth may or may
     not be electrically connected to the actual earth.
  
     The voltage between two points is also given by the charge
     present between those points in Coulombs divided by the
     capacitance in Farads.  The capacitance in turn depends on
     the dielectric constant of the insulators present.
  
     Yet another law gives the voltage across a piece of circuit as
     its inductance in Henries multiplied by the rate of change
     of current flow through it in Amperes per second.
  
     A simple analogy likens voltage to the pressure of water in a
     pipe.  Current is likened to the amount of water (charge)
     flowing per unit time.
  
     (1995-12-04)
  

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