You searched for: “coulomb
coulomb, coul., C
The standard international unit of electric charge, to the charge that passes through any cross-section of a conductor in one second during a constant current flow of one ampere.
This entry is located in the following unit: coulomb + (page 1)
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A unit related to: “coulomb
(named for French chemist Charles-Augustin de Coulomb (1736-1806), who devised a method of measuring electrical quantity)
Word Entries containing the term: “coulomb
Coulomb barrier
1. The electrostatic forces within the high potential energy region of a nucleus which prevents positively charged particles from reaching the nucleus of an atom.
2. Reactions between atomic nuclei are inhibited by the need for the nuclei to overcome the repulsive force that acts between any pair of similarly charged particles.

At high temperatures, nuclei move sufficiently fast to be able to overcome the Coulomb barrier.

The greater the nuclear charge, the higher is the temperature that is required for nuclear reactions to occur.

This entry is located in the following unit: coulomb + (page 1)
Coulomb crystal
A structure formed by electrons trapped at a liquid helium surface at sufficiently high electron densities and low temperatures, in which the electrons occupy the points of a two-dimensional hexagonal lattice.
This entry is located in the following unit: coulomb + (page 1)
Coulomb damping, dry friction damping
The dissipation of energy which occurs when a particle in a vibrating system is resisted by a force whose magnitude is a constant independent of displacement and velocity, and whose direction is opposite to the direction of the velocity of the particle.
This entry is located in the following unit: coulomb + (page 1)
Coulomb degeneracy
Identity of the energy levels of a charged particle bound in a Coulomb (electrostatic) field for different values of the orbital angular momentum, provided that the principal quantum number and spin state are the same.
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Coulomb energy
That part of the binding energy of a solid associated with the electrostatic interaction of the ions and electrons.
This entry is located in the following unit: coulomb + (page 1)
Coulomb excitation
1. The existence of a high-energy state within a nucleus, arising from the interaction of the nucleus and bombarding particles too weak to penetrate it.
2. Nuclear excitation caused by the time-dependent long-ranged electric field acting between colliding nuclei.

Theoretically, the Coulomb force between the positively charged colliding nuclei is well understood, and the interaction is calculable exactly.

Coulomb excitation usually is the dominant reaction in nuclear scattering, and even occurs at low bombarding energies where the separation of the nuclei is sufficiently large that the short-ranged nuclear force does not act.

This entry is located in the following unit: coulomb + (page 1)
Coulomb explosion
1. An explosion in which the outward driving force is the electrical repulsion of charge.
2. A process in which a molecule moving with high velocity strikes a solid and the electrons that bond the molecule are torn off rapidly in violent collisions with the electrons of the solid; as a result, the molecule is suddenly transformed into a cluster of charged atomic constituents that then separate under the influence of their mutual Coulomb repulsion.

Coulomb explosions are most commonly studied using a particle accelerator, normally employed in nuclear physics research, to produce a beam of fast molecular ions that are directed onto a solid-foil target.

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Coulomb field
1. The electric field generated by a stationary-charged particle.
2. The electrostatic field around a charged particle or object.
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Coulomb friction
In mechanics, a frictional force between dry stationary surfaces which is proportional to the normal force.
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Coulomb gage
A gage in which the divergence of the magnetic vector potential is equal to zero.
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Coulomb gauge, radiation gauge
In quantum mechanics, a noncovariant gauge (not changing with another variable) in which there are commutation relations only for the space part of the vector potential.
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Coulomb potential
1. In electricity, a scalar-point function equal to the work per unit charge used against or by the Coulomb force in moving a particle bearing an infinitely small positive charge from infinity to the field of a charged particle in a vacuum.
2. A scalar point function equal to the work per unit charge done against the Coulomb force in transferring a particle bearing an infinitesimal positive charge from infinity to a point in the field of a specific charge distribution.
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Coulomb scattering
1. In physics, the scattering of charged particles through their electrical interaction.
2. A collision of two charged particles in which the Coulomb force is the dominant interaction.
This entry is located in the following unit: coulomb + (page 1)
electrostatic attraction, coulomb attraction
1. An electrostatic force of attraction applied by one charged particle to an oppositely charged particle.
2. The electrostatic force of attraction exerted by one charged particle onto another charged particle of the opposite sign.
3. The tendency of bodies to draw together when carrying opposite charges of electricity.
electrostatic force, Coulomb force
1. The force exerted by stationary objects that are bearing an electric charge on other stationary objects bearing an electric charge.

If the charges are of the same sign, then the force is repulsive; if they are of opposite signs, the force is attractive.

The strength of the force is described by Coulomb's law or a law that was formulated by Charles Augustin de Coulomb (1736-1806), French physicist, which describes the electric forces between charged objects.

The law states that:

  • like charges repel each other and unlike charges attract each other,
  • the attraction or repulsion acts along the line between the two charges,
  • the size of the force varies inversely as the square of the distance between the two charges,
  • the size of the force is proportional to the value of each charge.

2. A force resulting from the attraction of stationary, charged bodies, proportional to the product of their magnitudes and inversely proportional to the square of the distance between them.
3. A force on a charged particle resulting from an electrostatic field, equal to the electric field vector times the charge of the particle.
4. Like charges in close proximity produce forces of repulsion between them; consequently, if two surfaces bear appreciable and approximately equal densities of charged groups on their surfaces appreciable forces of repulsion may occur between them.

The range of these forces is determined primarily by the ionic strength of the intervening medium, forces being of minimal range at high ionic strength.

The forces are effective over approximately twice the double layer of their thickness.

This entry is located in the following units: coulomb + (page 2) electro-, electr-, electri- (page 83)
electrostatic interactions, Coulomb interactions
The charged particle interactions of charged particles associated with the Coulomb forces which they exert on one another.

It includes the forces between two charged particles; such as, between electrons and protons, that according to Coulomb's law is proportional to the product of the charges and inversely proportional to the square of the distance between them and which is either repulsive or attractive, to each other depending on the relationship of the charges.

This entry is located in the following units: coulomb + (page 2) electro-, electr-, electri- (page 84)
electrostatic repulsion, Coulomb repulsion
The electrostatic repulsion force of repulsion exerted by one charged particle on another charged particle of the same sign or a symbol that identifies a positive or negative number.
This entry is located in the following units: coulomb + (page 2) electro-, electr-, electri- (page 85)
Word Entries at Get Words: “coulomb
coulomb, C
An SI unit of electrical charge.

One coulomb is the quantity of electricity conveyed by a current of one ampere in one second.

This entry is located in the following unit: Measurements and Mathematics Terms (page 5)