Discussion
Which action can destroy an alternator instantly?
Answer: B
Removing the battery removes the load and the smoothing, and the resulting voltage spike destroys the diodes and any electronics connected. It was once a test for charging; it is now a reliable way to cause expensive damage. Most errors here come from carrying across a result from a neighbouring case where it does not hold. Tracing the requirement back to the physical constraint that produces it makes the answer follow. The shared properties explain why these belong to one family, and the differences explain why more than one exists.
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