Definition
An electrical component, typically a coil of wire, that opposes changes in current flow by storing energy in a magnetic field. When current through the coil changes, the inductor generates a voltage that resists that change. Inductance is measured in henries (H).
Plain English
A coil of wire that pushes back when the electric current through it tries to change. It briefly stores energy in a magnetic field around the coil and uses that stored energy to slow down sudden changes in current.
Context Anchor
Seen in aircraft wiring diagrams, electrical system descriptions, and maintenance troubleshooting for electronic equipment.
Derivation
From the Latin inducere, meaning 'to lead in' or 'bring on.' The name refers to the way the coil 'induces' a voltage in itself (and in nearby conductors) whenever the current through it changes. Knowing this helps the term feel less abstract: an inductor is a component that produces an induced voltage.
Why Pilots Care
Inductors appear throughout aircraft electrical and ignition systems. Understanding that they resist sudden changes in current helps explain why ignition coils produce a high-voltage spark, why some circuits include filters to smooth power, and why switching inductive loads can produce voltage spikes that damage other components.
Grounding Statement
When current starts or stops in a coil, the changing magnetic field creates an electrical push that resists the sudden change.
Intuition Check
An inductor is not just any wire that carries electricity. Its important feature is that it resists changes in current by using a magnetic field.
Example Sentence 1
The technician traced the fault to a failed inductor in the avionics power supply filter circuit.
Example Sentence 2
During the inspection the mechanic tested the inductor to confirm it could still oppose rapid changes in current.