The ? motor converts electronic digital pulses into mechanical rotational steps.

• A. Servo
• B. Stepper
• C. Induction
• D. DC Brush

Answer: (B)

A stepper motor is designed to convert electronic digital pulses into precise, discrete rotations. Each pulse makes the rotor move by a specific step angle, so sending a sequence of pulses yields a controlled position without requiring feedback in many setups. This makes it ideal for applications needing accurate positioning, like printers or CNC stages. Different stepper designs—permanent magnet, variable reluctance, and hybrid—provide the stepping behavior, and microstepping can further refine resolution and smoothness. Other motor types don’t produce fixed steps from simple pulse signals: servo motors rely on feedback to reach and hold a position with continuous rotation; induction motors run on AC and are not driven in discrete steps by digital pulses; DC brush motors rotate continuously with speed set by voltage rather than by fixed steps.