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unit

Electric potential

voltage

Definition

The electric potential and voltage is the physical measure, which defines the potential difference between two points, proportional to the energy required for moving from one point to another of an electrical charge.

The electric potential and voltage is the physical measure, equal to the ratio of potential energy, which is possessed by the positive charge, positioned in that point of the field to this field.

1 volt is the electric voltage that in an electrical circuit causes a current of 1 ampere at power of 1 watt.

1 volt is the potential difference between two points of a conducting wire carrying a constant current of 1 ampere, when the power dissipated between these points is equal to 1 watt.

1 volt is the electric potential, in which the charge of 1 coulomb possesses potential energy of 1 joule.

 

system of units:   SI;
statute:   derived unit (with a special name);
name the value:   U;
unit name:   volt;
symbol unit:   V;
relationship of definition:   U = E/Q;
dimension:   L2 M T-3 I-1;
expression in other units:   statvolt;

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Units of measurement

namesymbol value in SI unit:
V
note
1 abvolt = 10-8 
1 EMU (abvolt) = 10-8(1)
1 ESU (statvolt) ≈ 299.792 5(2)
1 statvolt ≈ 299.792 5 
1 ampere per siemensA/S= 1.0 
1 ampere ohmA·Ω= 1.0 
1 watt per ampereW/A= 1.0 
1 joule per coulombJ/C= 1.0 

Note

(1) - EMU - electromagnetic unit;

(2) - ESU - electrostatic unit.