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An Inductor reacts to an increase in current flow by a voltage that is counter
to the applied voltage. This voltage is called counter electromotive force,
known as CEMF. This CEMF opposes the increase in current, and the more rapid
the change in current, the more the opposition to those changes.
The CEMF will also oppose decreases in current, by a voltage that aids the
source voltage, and thereby tries to maintain the present current flow.
Because events per second are considered cyclic, and cyclic indicates circles,
the formula for Inductive Reactance has two times pi as a constant, with the
rapidity as frequency in Hz.
The resulting Inductive Reactance is also dependant on the amount or value of
Inductance in Henrys. The actual formula then is simply the 2 pi, times the
frequency, times the value of Inductance, giving a value of Inductive Reactance
in Ohms.
Simply stated, the Inductive Reactance in ohms increases linearally as the
frequency increases.
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