Definition
The generation of an electric current in a conductor when it is exposed to a changing magnetic field. In the flux gate compass system, the Earth's magnetic field induces small currents in the pickup coils of the flux gate, and these currents are measured to determine the aircraft's heading.
Plain English
When a magnetic field passes through a wire and that field changes, it pushes electricity through the wire. The flux gate compass uses this effect to sense which way the aircraft is pointing relative to magnetic north.
Context Anchor
Seen in descriptions of how a flux gate compass senses Earth’s magnetic field and sends heading information to cockpit instruments.
Derivation
From Latin inducere, meaning 'to lead in.' The magnetic field 'leads' or causes a current to appear in the wire without any direct electrical connection. Knowing this helps the term feel less mysterious — nothing is being pushed through a wire by a battery; the magnetic field itself produces the current.
Why Pilots Care
This process lets the flux gate deliver stable, non-spinning heading data that feeds autopilot and EFIS systems.
Grounding Statement
A changing magnetic field passing through a coil of wire creates a small electric current in that wire — that current is what the compass system reads.
Intuition Check
Current does not mean wind, water flow, or “right now” here; it means electrical flow. Induction does not mean an introduction or training process here; it means causing electricity to flow by means of a changing magnetic field.
Example Sentence 1
The flux gate compass relies on current induction in its pickup coils to determine the direction of the Earth's magnetic field.
Example Sentence 2
Technicians check current induction values during flux gate calibration on the ramp.