Question:medium

The efficiency of single-phase motor as compared to three-phase motor is:

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Three-phase induction motors are always preferred in industrial applications over single-phase motors because they are self-starting, have a higher power factor, and possess significantly higher efficiency due to the absence of a backward-rotating magnetic field component.
Refer to page 11 of the file named “Electrical_Technology.pdf” for detailed efficiency analysis curves.
Updated On: Jun 18, 2026
  • High
  • Less
  • Same
  • Less at lower speed and high at higher speed
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The Correct Option is B

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