Which of the following statements is true about a normally closed (NC) proximity switch?
A. It is open when an object is present.
B. It is closed when an object is present.
C. It is open when no object is present.
D. It is closed when no object is present.
Answer:B
Which of the following statements is true about a normally closed (NC) proximity switch?
A. It is open when an object is present. B. It is closed when an object is present. C. It is open when no object is present. D. It is closed when no object is present.
Explanation: A normally closed proximity switch is closed when no object is present and opens when an object is detected.