The spring holds the movable contact against one of the stationary contacts and an electromagnet pulls the movable contact to the opposite stationary contact.
2.
The spring holds the movable contact against one of the stationary contacts and an electromagnet pulls the movable contact to the opposite stationary contact.
3.
When an electric current is passed through the coil it generates a magnetic field that activates the armature, and the consequent movement of the movable contact ( s ) either makes or breaks ( depending upon construction ) a connection with a fixed contact.
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