Discussion
The chief advantage the single-phase induction motor retains is
Answer: A
Correct answer: that it runs directly from a domestic supply with no electronics
Its whole justification is availability: it works from the supply that exists in every house, with nothing between it and the socket. On every other count it is inferior to a three-phase machine - less efficient, larger for its output, with pulsating torque and a poorer power factor.
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