Which term describes a closed-loop system that positions an object in accordance with input information?

• A. Servo
• B. Servomechanism
• C. Synchroscope
• D. Tertiary Winding

Answer: (B)

A servomechanism is a closed-loop control system that positions a mechanism to match a commanded input. It uses feedback from the actual position to generate an error signal, which a controller uses to drive an actuator so the output moves until it aligns with the desired position. The term describes the whole system that performs this precise positioning, not just the actuator itself. While a servo motor is the actuator commonly used inside such systems, the key idea is the feedback-driven loop that continuously corrects movements to achieve accurate positioning. The other terms don’t describe this positioning-controlled loop: a synchroscope relates to synchronizing rotating machines, and a tertiary winding is a transformer component.