What unit is the inductive reactance of a coil measured in?

Prepare for the ET ASNT Level II Exam. Study with flashcards and multiple-choice questions, each question includes hints and explanations. Pass your exam with confidence!

Inductive reactance is a property of an inductor that opposes the change of current through it, and it represents the resistance that an inductor offers to alternating current (AC). The unit of inductive reactance is Ohms, which is the standard unit for measuring electrical resistance and reactance in general.

In the context of inductors, inductive reactance is calculated using the formula:

[ X_L = 2\pi f L ]

where ( X_L ) is the inductive reactance in Ohms, ( f ) is the frequency in hertz, and ( L ) is the inductance in henries. Although henries is the unit for measuring inductance itself, inductive reactance, being a frequency-dependent opposition to current, is specifically measured in Ohms. This distinction is crucial for understanding AC behavior in electrical circuits.

The other units listed, such as Mhos, Henrys, and Gauss, refer to different electrical and magnetic properties, making them unsuitable for measuring inductive reactance directly. Mhos is the unit of conductance, Henrys refers to inductance itself, and Gauss is a unit of magnetic flux density.

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