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8817
How does the magnetic brake used to stop rotation of an electric motor armature operate?
| | A) A friction brake is applied by a spring and released by a magnet. |
| | B) A friction brake is applied by a magnet and released by a spring. |
| | C) Centrifugal force releases a rotating brake cog from a stationary notch when the armature reaches a certain speed and magnetic force re engages the cog when the electrical power is turned off. |
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