the.com/reactance
the universe's way of opposing change without ever actually spending energy.
means In electrical circuits, reactance is the opposition to alternating current that comes from inductors and capacitors, storing and releasing energy rather than dissipating it like resistance does — measured in ohms.
from A 19th-century technical coinage built from 'react' plus the suffix '-ance' (denoting a state or quality), formed on the same pattern as 'resistance' and 'capacitance.' 'React' itself comes from Latin 're-' ('back, again') and 'agere' ('to do, drive, act') — so at root it means 'to act back.' The word was adopted by electrical engineers as they worked out how circuits push back against changing currents, a fitting name for a force that responds to change by acting against it.
- no work
- Stores and returns energy, never burns it
- two flavors
- Inductors love current, capacitors hate change
- frequency tied
- Vanishes at DC, dominates at high speed
- phase trick
- Pushes voltage and current 90 degrees apart
- psychology too
- Humans rebel against rules that threaten their freedom