permanent-magnet moving-iron instrument

permanent-magnet moving-iron instrument

[′pər·mə·nənt ¦mag·nət ¦müv·iŋ ¦ī·ərn ′in·strə·mənt]
(engineering)
A meter that depends for its operation on a movable iron vane that aligns itself in the resultant magnetic field of a permanent magnet and adjacent current-carrying coil.
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