ITPEC FE Morning April 2019 Question 21
ITPEC FE Morning April 2019 — Question 21 of 80
Actuator — converts an electrical control signal from a computer into mechanical motion.
Key concept:
- Actuator = electrical signal → physical movement (e.g., motor, servo, valve)
- Opposite of a sensor, which converts physical quantity → electrical signal
Why not others:
- (a) — describes an A/D converter (analog-to-digital)
- (c) — describes a sensor (detects physical quantity → electrical signal)
- (d) — describes an input device (keyboard, touch panel)
Key rule: Sensor reads the environment; actuator acts on it.
AI-generated — may contain errors
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