A person or thing that is acting or capable of acting.
"Alumni could become more active in giving guidance and leadership to students. They act as sort of a 'maturity governor' on fraternities," notes Ratliff, citing surveys suggesting that fraternity actives presume mistakenly that alumni want hazing […]
Any component that is not passive. See Passivity (engineering).
From Middle English actyf, from Old French actif, from Latin āctīv(us), from agere (“to do, to act”), ultimately from Proto-Indo-European *h₂éǵeti. By surface analysis, act + -ive.
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Components are split into two broad segments: actives and passives. Active components like the vacuum tube and the transistor contain the power to generate and alter electrical signals.