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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
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reactance (X)
A property of a circuit containing capacitance or inductance that together with any resistance makes up its impedance. The impedance Z is given by Z 2 = R 2 + X 2, where R is the resistance. For a pure capacitance C, the reactance is given by XC = 1/2πfC, where f is the frequency of the alternating current; for a pure inductance L, XL = 2πfL. If resistance, inductance, and capacitance are in series the impedance Z = √[R2 + (XL - XC)2]. Reactance is measured in ohms.
Related category
• ELECTRICITY AND MAGNETISM
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