What is reactance?
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Opposition to the flow of direct current caused by resistance
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A property of ideal resistors in AC circuits
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Opposition to the flow of alternating current caused by capacitance or inductance
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A large spark produced at switch contacts when an inductor is deenergized
Reveal answer
Fill a bubble to check yourself
C
Correct answer
Explanation
Reactance is the opposition to the flow of alternating current caused specifically by capacitance or inductance in a circuit. It is a component of impedance and is measured in ohms. Capacitive reactance decreases with frequency, while inductive reactance increases with frequency. Option A is incorrect because reactance applies to AC, not DC. Option D describes an inductive spike, not reactance itself.