Question 1 of 10
What does PIR stand for?
PIR stands for Passive Infrared.
Question 2 of 10
What type of radiation does a PIR sensor detect?
PIR sensors detect infrared radiation.
Question 3 of 10
What is the primary source of infrared radiation that a PIR sensor detects in this application?
PIR sensors detect infrared radiation emitted by a warm body, such as a human.
Question 4 of 10
What triggers the PIR sensor to activate?
The sensor detects a change in IR energy when a person moves.
Question 5 of 10
What does the PIR sensor's output signal indicate?
The output signal indicates that the sensor has detected a person.
Question 6 of 10
Which of these is most likely to be detected by a PIR sensor?
Moving warm bodies are the primary targets.
Question 7 of 10
What is the key working principle behind a PIR sensor?
It relies on sensing changes in infrared radiation levels.
Question 8 of 10
A PIR sensor is considered a 'passive' sensor because it:
It doesn't actively emit, it only detects.
Question 9 of 10
What is the typical range of a PIR sensor?
The range varies.
Question 10 of 10
In a security system, what is the most common use of a PIR sensor?
PIR sensors are often used as motion detectors for security.
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