Otis Singleton
Electric potential is a scalar quantity that measures the capacity of an electric field to do work. It is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field. The unit of measurement for electric potential is volts, which is equivalent to joules per coulomb. Electric potential is related to voltage, which is the common name for electric potential difference. Voltage is a measure of potential energy per unit charge. It is important to note that voltage and energy are related but distinct concepts.
| Characteristics | Values |
|---|---|
| Definition | Electric potential is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field. |
| Formula | The electric potential difference between points A and B, (VB – VA) is the change in potential energy of a charge (q) moved from A to B, divided by the charge. |
| Unit | Volt (V) |
| Other units | Joules per coulomb (J/C) |
| Other names | Voltage, electrostatic potential, Galvani potential, fermi level |
| Factors | The potential of a set of discrete point charges (qi) at points (ri) |
| Calculation | Significantly simplified by the addition of potential (scalar) fields |
| Scalar quantity | V or occasionally φ, equal to the electric potential energy of any charged particle at any location (measured in joules) divided by the charge of that particle (measured in coulombs) |
| Vector quantity | Electrostatic field |
| Vector fields | Electric fields have both magnitude and direction at every point at which the field is defined |
| Scalar potential | Defined by including the magnetic vector potential A |
| Work done | The work done in moving a unit charge from one point to another is equal to the difference in potential energies at each point |
| Energy | The capacity of an electric field to do work |
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What You'll Learn
Electric potential is a measure of the desirability of a location
Electric potential is a scalar quantity, meaning it has no direction associated with it. It is a measure of the desirability of a location, and it is created by an electric field at a location, which is in turn created by a charge. The electric potential at a point is the electric potential energy per unit charge. This value can be calculated in either a static (time-invariant) or a dynamic (time-varying) electric field at a specific time. The unit of measurement for electric potential is the volt, which is equal to joules per coulomb.
The electric potential at a point is influenced by the presence of charges. Charges create electric fields, which work similarly to gravitational fields. In a uniform field, the potential is the strength of the field multiplied by the distance away. This is analogous to how the height of a hill affects the gravitational potential energy of an object.
The electric potential between two points is defined as the change in potential energy of a charge moved between those two points, divided by the charge. This is also known as the potential difference or voltage. Voltage is related to energy but is not the same thing. It is a measure of potential energy per unit charge.
The work done in moving a unit charge from one point to another within an electric circuit is equal to the difference in potential energies at each point. This difference in potential can be measured with a voltmeter.
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It is the work done in moving a unit charge from one point to another
Electric potential is a scalar quantity, meaning it has no direction associated with it. It is the work done in moving a unit charge from one point to another, such as within an electric circuit. It is a measure of the desirability of a location. Energy tends to move around, and things with energy tend to lose that energy. The electric potential, or the work done, is equal to the difference in potential energies at each point.
The electric potential at two points, A and B, is defined as the change in potential energy of a charge moved from A to B, divided by the charge. The electric force exerted by the field on a positive charge is equal to the charge multiplied by the electric field. To move the charge from plate A to plate B, an equal and opposite force must be applied.
The unit of measurement for electric potential is the volt, which is equivalent to joules per coulomb. In other words, it is the energy per unit charge. In the International System of Units (SI), electric potential is expressed in joules per coulomb, or volts. Voltmeters are used to measure the difference in potential energy between two points.
In the context of electrochemistry, electric potential is defined as the capacity of an electric field to do work. It is also referred to as voltage or electric potential energy.
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It is the capacity of an electric field to do work
Electric potential is the capacity of an electric field to do work. It is a scalar quantity, meaning it has magnitude but no direction. It is a measure of the desirability of a location for an electric charge.
The electric potential is created by an electric field at a location, which is in turn created by a charge. The electric field exerts a force on a charged object, and the magnitude of this force is given by the quantity of the charge multiplied by the magnitude of the electric field vector.
The electric potential is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field. The work done in moving a unit charge from one point to another is equal to the difference in potential energies at each point. This is also known as the potential difference or voltage.
In the International System of Units (SI), electric potential is expressed in units of joules per coulomb, or volts (V). The volt is named after Alessandro Volta. One volt is equal to one joule per coulomb. Differences in potential can be measured with a voltmeter.
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It is the potential energy per unit charge
Electric potential is a scalar quantity denoted by V or φ, and it is the potential energy per unit charge. This means that electric potential is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field. The electric potential at infinity is assumed to be zero.
The electric potential difference between points A and B, (VB - VA), is defined as the change in potential energy of a charge (q) moved from A to B, divided by the charge. The unit of electric potential difference is the volt (V), which is equivalent to joules per coulomb (J/C). One volt is equal to one joule per coulomb.
In the International System of Units (SI), electric potential is expressed in joules per coulomb (volts), and differences in potential energy are measured with a voltmeter. The voltmeter measures the potential difference corrected for the different atomic environments.
The electric potential is created by an electric field at a location, which is in turn created by a charge. The electric field exerts a force on a charged object, and the magnitude of this force is given by the quantity of the charge multiplied by the magnitude of the electric field vector.
The concept of electric potential can be understood by drawing an analogy with gravitational potential energy. Just as a ball tends to roll downhill, losing gravitational potential energy and gaining kinetic energy, positive electric charges tend to move away from each other, and negative charges are attracted to positive charges. This movement of charges requires energy and stores energy.
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It is measured in joules per coulomb (i.e. volts)
Electric potential is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field. It is measured in joules per coulomb (i.e. volts). In other words, it is the potential energy per unit charge. This value can be calculated in either a static (time-invariant) or a dynamic (time-varying) electric field at a specific time.
In the International System of Units (SI), electric potential is expressed in units of joules per coulomb (volts), and differences in potential energy are measured with a voltmeter. One volt is equal to one joule per coulomb.
The volt is named after Alessandro Volta. Voltage is a common term for electric potential difference. When a voltage is quoted, it is understood to be the potential difference between two points. For example, a battery's voltage is the potential difference between its two terminals.
In some other systems of units, such as CGS-Gaussian, the equations used to calculate electric potential would be different.
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Frequently asked questions
Electrical potential is a measure of the capacity of an electric field to do work. It is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field.
The unit of measurement for electrical potential is the Volt (V). One Volt is equal to one Joule per Coulomb (J/C).
Voltage is the common name for electrical potential difference. Voltage is a measure of potential energy per unit charge. Thus, voltage and electrical potential are related but not the same.
Electric fields are vector fields with both magnitude and direction, while electric potential is a scalar quantity with no direction. Electric potential is simpler and more practical to use than electric fields in some cases.
Electric potential creates a "hill" that positive charges want to move away from and negative charges want to move towards. This is similar to how objects move downhill due to gravitational potential energy.
