The____________ emits a high-frequency sound wave and then detects the echo when it bounces off the object.
A) photodetector
B) ultrasonic detector
C) proximity detector
D) proximity sensor
Correct Answer:
Verified
Q1: Limit switches may be momentary contact or
Q3: _are fast acting and are often used
Q4: Most microswitches require a movement of approximately
Q5: Pancake-type solid-state sensors are designed to detect
Q6: Inductive proximity switches operate on the eddy
Q7: Capacitive proximity sensors are designed to detect
Q8: Contacts must be selected according to the
Q9: Some reflector units have a range of
Q10: _used in burglar alarm systems commonly use
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