Which item is listed as the first advantage of AC motors over DC motors?

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

Answer: (B)

The key idea here is how power is supplied for the motor. AC motors can run directly from the AC power already provided by utility grids, which is readily available in virtually all locations. This means you can connect an AC motor to a standard AC supply without needing extra hardware to convert or generate DC power, making installation simpler and cheaper upfront. DC motors, by contrast, require a dedicated DC source or rectifiers to convert AC to DC and additional control equipment to manage speed and torque, adding cost and complexity. So, the first advantage highlighted is that AC motors have a readily available power supply.