current density

n. Electricity Symbol j, J The current flowing in a conductor per unit of cross-sectional area perpendicular to the current flow, given in units of amps per meter squared.

current density

n (General Physics) the ratio of the electric current flowing at a particular point in a conductor to the cross-sectional area of the conductor taken perpendicular to the current flow at that point. It is measured in amperes per square metre. Symbol: J

cur′rent den`sity

n. the amount of current flowing through a given cross-sectional area in a given time interval: usu. measured in amperes per square centimeter.

Current Density

Current density

A vector quantity equal in magnitude to the instantaneous rate of flow of electric charge, perpendicular to a chosen surface, per unit area per unit time. If a wire of cross-sectional area A carries a current I, the current density J is I/A. The units of J in the rationalized meter-kilogram-second system are amperes per square meter.

Current Density

a vector quantity whose magnitude is equal to the electric charge flowing per unit time per unit area, where the area is perpendicular to the direction of motion of the charge. If the charge density (the charge per unit volume) is equal to ρ, then the current density is j = ρv, where v is the average velocity of the ordered flow of the charges. When the distribution of the current density is uniform over the cross section of the conductor, the current I is equal to jS, where S is the cross-sectional area of the conductor.

current density

[′kər·ənt ‚den·səd·ē] (electricity) The current per unit cross-sectional area of a conductor; a specialization of the physics definition. Also known as electric current density. (physics) A vector quantity whose component perpendicular to any surface equals the rate of flow of some conserved, indestructible quantity across that surface per unit area per unit time. Also known as current.

单词	current density
释义	current density current density n. Electricity Symbol j, J The current flowing in a conductor per unit of cross-sectional area perpendicular to the current flow, given in units of amps per meter squared. current density n (General Physics) the ratio of the electric current flowing at a particular point in a conductor to the cross-sectional area of the conductor taken perpendicular to the current flow at that point. It is measured in amperes per square metre. Symbol: J cur′rent den`sity n. the amount of current flowing through a given cross-sectional area in a given time interval: usu. measured in amperes per square centimeter. Current Density Current density A vector quantity equal in magnitude to the instantaneous rate of flow of electric charge, perpendicular to a chosen surface, per unit area per unit time. If a wire of cross-sectional area A carries a current I, the current density J is I/A. The units of J in the rationalized meter-kilogram-second system are amperes per square meter. Current Density a vector quantity whose magnitude is equal to the electric charge flowing per unit time per unit area, where the area is perpendicular to the direction of motion of the charge. If the charge density (the charge per unit volume) is equal to ρ, then the current density is j = ρv, where v is the average velocity of the ordered flow of the charges. When the distribution of the current density is uniform over the cross section of the conductor, the current I is equal to jS, where S is the cross-sectional area of the conductor. current density [′kər·ənt ‚den·səd·ē] (electricity) The current per unit cross-sectional area of a conductor; a specialization of the physics definition. Also known as electric current density. (physics) A vector quantity whose component perpendicular to any surface equals the rate of flow of some conserved, indestructible quantity across that surface per unit area per unit time. Also known as current. current density current density The amperage divided by the surface area to which it is applied, e.g., in electrosurgery.See also: density FinancialSeedensityEncyclopediaSeec/d
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