A device, substance, or person that excites or stimulates something, particularly in electrical engineering or physics.
From 'excite' (from Latin 'excitare') + '-er' (agent noun suffix). In electrical engineering, an 'exciter' specifically generates the magnetic field in generators and motors.
In electrical engineering, an exciter is the unsung hero that makes generators work—it's a smaller generator that creates the magnetic field for the big generator. Without exciters, we wouldn't have electricity!
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