Alessandro Volta In physics, an electronvolt (symbol eV, also written electron-volt and electron volt) is the amount of kinetic energy gained by a single electron accelerating from rest through an electric potential difference of one volt in vacuum. Therefore, another way of expressing Kirchhoff’s voltage law in equation form is: V s – V 1 – V 2 – V 3 – . As you said, voltage is a way of measuring electromotive force, since a force acting on a charge gives it the ability to do work, aka a voltage is created. One volt is equal to current of 1 amp times resistance of 1 ohm: 1V = 1A ⋅ 1Ω. Equivalently, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. From this definition, we can use an equation from electronics W=VQ, where W is work done (energy), V is potential difference and Q … Current, Voltage and Power. This difference in charge between the two points is called voltage. We define voltage as the amount of potential energy between two points on a circuit. Learn more about the difference between electromotive force and potential difference and dimension of electromotive force here. A voltage source is a device used in electric circuits that has a fixed potential difference between its ends. ; Current. We define electron volts as 'the energy required to accelerate an electron across a potential difference of 1 volt'. You can verify Kirchhoff’s voltage law by connecting a circuit and measuring each resistor voltage and the source voltage. One point has more charge than another. – V n = 0. The volt per meter, or some fractional unit based on it, is used as a means of specifying the intensity of the electromagnetic field (EM field) produced by a radio transmitter. EMF can be stated as the work done per unit of charge and the SI unit of Electromotive force is Volt. Current (I) is the rate of flow of Charge Carriers, such as electrons.Current is usually thought of as moving in the direction of positive charge, so from the positive power supply to the negative. When the resistor voltage are added together, their sum will equal the source voltage. The same is true of joules and electron volts. . Definition. Volt is the electrical unit of voltage or potential difference (symbol: V). One volt is defined as the difference in electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. The unit of potential difference is the Volt (V), which is equal to a Joule per Coulomb (J/C). . One Volt is defined as energy consumption of one joule per electric charge of one coulomb. Volt (V) Volt definition. 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