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Definition of "Inductive Reactance" |
Electrical current produces heat and/or a magnetic field (such as in the windings of a motor). We refer to the tendency for current flow and changes in flow to be influenced by magnetic fields as inductance. An AC circuit that contains only inductance, capacitance or a combination of the two is defined by the total opposition to current flow expressed in reactance. Inductance only affects current flow when the current is changing. Inductance produces a self-induced voltage (called a counter emf) that opposes changes in current. Obviously, the current changes constantly in an AC circuit. Inductance in an AC circuit, therefore, causes a continual opposition. This opposition to current flow is called inductive reactance. / The opposition to the flow of an alternating current caused by the inductance of a circuit, expressed in ohms. Identified by the symbol XL. Inductive reactance = 2 x 3.14 x F X L [2 x pie x frequency x Inductance]. / Electrical current produces heat and/or a magnetic field. We refer to the tendency for current flow and changes in flow to be influenced by magnetic fields as inductance. An AC circuit that contains only inductance, capacitance or a combination of the two is defined by the total opposition to current flow expressed in reactance. Inductance only affects current flow when the current is changing. Inductance produces a self induced voltage that opposes changes in current. / opposition to the flow of AC current produced by an inductor. Measured in Ohms and varies in direct proportion to frequency. |
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