What is an advantage of DC motor powered by batteries?

• A. Battery backup capability
• B. Requires no power source
• C. No maintenance
• D. Large physical footprint

Answer: (A)

The main idea here is that having a DC motor powered by batteries provides on-board energy storage, giving you battery backup capability. This means the motor can operate even if the primary power source is unavailable, which is ideal for power outages, remote locations, or portable applications where a constant grid supply isn’t guaranteed. The other options don’t fit this benefit: the system still needs a power source (just a stored one), maintenance isn’t eliminated because batteries and motors require upkeep, and a larger footprint is typically a disadvantage rather than an advantage.