Charged particles in conduction current (such as free electrons in metal, positive and negative ions in electrolyte solution, ions and electrons in gas)electric fieldUnder the action ofconductorThe current generated by the internal directional movement.The conduction current only exists in the conductor, and its amplitude is independent of the frequency of the applied electric field.
Under the action of alternating field, there are two kinds of currents with different properties in the medium, and conduction current is one of them.The conduction current is equivalent to the directional movement of free electrons and is determined by the resistivity of the medium.When conducting current passes through a conductor, not only Joule heat is generated, but also vortex magnetic field is excited in the space around the conductor.The effect of conduction current on the distribution of electromagnetic field is mainly considered in low-frequency AC electrical method.[2]
Example of conduction current
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In the process of electrostatic induction, a large amount offree electronDirectional motion will occur under the external electric field,formationMacro current, but the duration of this current is extremely short.If both ends of the conductor are connected to the two poles of the battery, a long lasting current can be formed in the conductor.The current existing in the conductor is called conduction current.
