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Which of the following motors has the best starting torque?

  1. Square

  2. Round

  3. Rectangle

  4. Triangular

The correct answer is: Square

The square motor design is recognized for its superior starting torque compared to other configurations. This characteristic is linked to its construction, which typically allows for better efficiency in generating initial rotational force. Square motors often have a design that facilitates a greater magnetic flux, contributing to a more effective interaction with the magnetic field at startup. In contrast, round, rectangle, and triangular motor designs may be less effective in producing high starting torque due to variations in their magnetic and physical characteristics. These designs may not optimize the distribution of magnetic forces or may have inefficiencies that impede their performance during startup. The square design's structure inherently provides advantages in torque production, making it the preferred option when high starting torque is required.