An encoder senses the angle of the motor shaft and converts the angle to a digital code.

• A. False
• B. True
• C. Only rotational speed
• D. Analog signal

Answer: (B)

Encoders provide positional feedback by sensing the rotation angle of the motor shaft and converting that angle into a digital code. That is exactly what the statement describes, so it’s correct. The encoder’s job is to translate physical position into a digital representation that a controller can read. There are two main types: incremental encoders, which give pulses proportional to movement and speed, and absolute encoders, which output a direct code for the current angle so position is known even after power cycles. Also, encoders typically produce digital signals (pulses or coded words), not analog voltages; an analog signal would be more typical of a potentiometer or an analog sensor, not standard encoder feedback for precise position. So the description matches how encoders work and why the angle is represented as a digital code.