Reactance may refer to:
- Reactivity (chemistry), the rate at which a chemical substance tends to undergo a chemical reaction
- Reactance (physics), the imaginary part of impedance, a circuit's opposition to alternating current
- Reactance (psychology), an emotional reaction to pressure or persuasion that results in the strengthening or adoption of a contrary belief
See also
This disambiguation page lists articles associated with the title Reactance.
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