Motor circuits are likely to be protected by a circuit breaker because:

• A. motors draw a surge of current when first started.
• B. motors run on DC but require AC.
• C. to prevent voltage drop in the battery.
• D. to reduce overall vehicle current.

Answer: (A)

Motors draw a surge of current when first started, because there is no back-EMF yet to limit the current and the motor acts like a low-resistance load at standstill. A circuit breaker in the motor circuit is there to tolerate that brief inrush but to trip if the current stays high or a fault occurs, protecting wiring, connectors, and the motor from overheating or damage. It isn’t about whether the motor is AC or DC, nor about preventing voltage drops or reducing vehicle current in general; it’s about interrupting excessive current to prevent damage during startup and in fault conditions.