Question

question 5 5 pts among the following devices, which one is not an actuator? options: microphone, dc motor, speaker, electrical valve

Explanation:

An actuator is a device that converts energy (usually electrical) into mechanical motion. A microphone converts sound (mechanical energy in the form of sound waves) into electrical signals, so it is a sensor (transducer) not an actuator. A DC motor, speaker, and electrical valve are actuators: DC motor converts electrical to mechanical rotation, speaker converts electrical to sound (mechanical vibration), electrical valve controls fluid flow via electrical signal (mechanical movement of valve).

Answer:

A. Microphone