Which of the following electric meter movements uses a stationary permanent magnet and movable coil?
Official USCG Answer & Rule Citation
Correct Answer: Option D — D'Arsonval
The D'Arsonval movement is the foundational design for many analog meters. It operates by passing current through a movable coil suspended in the field of a stationary permanent magnet, causing a torque proportional to the current, a principle detailed in 46 CFR Subchapter J.
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