# potential difference

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Related to Electric Potential Difference: electric current, Electric potential energy

## potential difference

the difference in electric potential between two points in an electric field; the work that has to be done in transferring unit positive charge from one point to the other, measured in volts.

## Potential Difference

The potential difference between two points of a steady-state electric or gravitational field is defined as the work done by the forces of the field when a unit positive charge or unit mass, respectively, is moved from the point with the higher potential to the point with the lower potential. If Φ1 and Φ2 are the potentials at the initial and the final points of the trajectory of the charge or mass being moved, then the potential difference is u = Φ1 - Φ2, and the change in the potential is ΔΦ = Φ2 - Φ1 = - u.

The work done by an arbitrary electric field in moving a positive unit charge from one point to another is called the voltage between the points. In the case of a steady-state field, the voltage is the same as the potential difference.

## potential difference

[pə′ten·chəl ¦dif·rəns]
(electricity)
Between any two points, the work which must be done against electric forces to move a unit charge from one point to the other. Abbreviated PD.

## potential difference

References in periodicals archive ?
Caption: Figure 3: Changes in electric potential difference and voltage enhancement factor as a function of the azimuth.
(a) Electric potential difference on the surface of the cylinder for different thickness of the rubber sole.
The ionic flux is contributed by diffusion due to ionic concentration gradient, convection of the fluid and electromigration due to the electric potential difference. In a dilute solution, the ionic flux is governed by Nernst-Planck equation,
The proces uses a low-level direct current on the order of milliamperes per sq cm of cross-sectional area between the electrodes or an electric potential difference A few volts per centimeter across electrodes placed in the ground in an open-flow arrangement is sufficient to activate the process.

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