Defn: The influence of a coil of wire upon an alternating current passing through it, tending to choke or diminish the current, or the similar influence of a condenser; inductive resistance. Reactance is measured in ohms. The reactance of a circuit is equal to the component of the impressed electro-motive force at right angles to the current divided by the current, that is, the component of the impedance due to the self-inductance or capacity of the circuit.
REACTANCE COIL
Reactance coil (Elec.)
Defn: A choking coil.
REACTION
Re*ac"tion, n. Etym: [Cf. F. réaction.]
1. Any action in resisting other action or force; counter tendency; movement in a contrary direction; reverse action.
2. (Chem.)
Defn: The mutual or reciprocal action of chemical agents upon each other, or the action upon such chemical agents of some form of energy, as heat, light, or electricity, resulting in a chemical change in one or more of these agents, with the production of new compounds or the manifestation of distinctive characters. See Blowpipe reaction, Flame reaction, under Blowpipe, and Flame.
3. (Med.)
Defn: An action included by vital resistance to some other action; depression or exhaustion of vital force consequent on overexertion or overstimulation; heightened activity and overaction succeeding depression or shock.
4. (Mech.)