Compared to PSC motors, brushless DC motors:

A) More efficient, but not well suited for variable-speed applications.
B) Inexpensive, but also less efficient.
C) More efficient and better suited for variable-speed applications.

D) Are less efficient, but well suited for variable-speed applications.


C

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When electrical energy is applied to a device that can convert it to another form of energy, such as an electric motor converting it to mechanical energy, it performs ____.

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Why do gas furnace efficiencies jump from 80% to 90%?

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