In a pressure sensor system, the component that converts movement into an electrical signal is called a ______.

• A. Transducer
• B. Sensor
• C. Amplifier
• D. Switch

Answer: (A)

Energy conversion is the essential role of a transducer: it converts energy from one form to another. In a pressure sensor system, the mechanical change from pressure becomes an electrical signal via the transducer. A sensor detects changes but does not necessarily convert energy; an amplifier boosts signal, and a switch changes a state. So the component that performs the conversion from movement to an electrical signal is the transducer.