What is the second listed advantage of AC motors over DC motors?

• A. A readily available power supply
• B. Cheaper
• C. Maintenance Cost
• D. Less Weight

Answer: (B)

Cost is often the second benefit highlighted for AC motors. Once you can power the motor from standard AC lines, the remaining advantage comes from the motor’s simple, rugged construction. Induction-type AC motors have far fewer moving parts—no brushes or commutators—so they’re cheaper to manufacture and buy, and they incur lower maintenance costs over time. That combination keeps the overall cost of ownership lower compared with DC motors, which rely on brushes and more complex speed-control gear that wear and need replacement. While readily available power is a major plus, the next natural win is the lower price and simpler upkeep that comes with the conventional AC motor design.