When checking the resistance of the different parts of a relay, ...

[DyllonKazuo]

When checking the resistance of the different parts of a relay, what resistance should you expect for the coil, normally open contacts, and normally closed contacts?
 
  What will be an ideal response?

Question 2

What is a proximity switch and how does it operate?
 
  What will be an ideal response?

[nital]

Answer to Question 1

With the coil de-energized, normally open = infinite resistance, normally closed = 0 resistance

Answer to Question 2

Proximity switches often limit motion and are often operated by the movement of a mechanical device. An example would be a switch that stops the motor

used for opening air inlet dampers once they have reached a full open position.

[DyllonKazuo]

Thanks

[nital]

Welcome