Inductor, Wikipedia
An inductor（＊不定冠詞；具体的、ある特定の例を意識）, also called a coil or reactor, is a passive two-terminal（2端子）electrical component which resists changes（変化；＊複数、色々な変化、一般）in electric current（＊無冠詞、特定する必要ない）passing through it. It consists of a conductor such as a wire, usually wound into a coil. Energy is stored in a magnetic field in the coil as long as current（＊無冠詞）flows. When the current flowing through an inductor changes, the time-varying（時間的に変化、時変）magnetic field induces a voltage（＊不定冠詞）in the conductor, according to Faraday’s law of electromagnetic induction. According to Lenz's law（＊無冠詞）the direction of induced electromotive force (or "e.m.f.") is always such that it opposes the change in current that created it. As a result, inductors（＊複数）always oppose a change in current, in the same way that a flywheel opposes a change in rotational velocity（回転速度；＊無冠詞）. Care should be taken（気を付ける、注意）not to confuse this with the resistance provided by a resistor.
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