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Electric Bell.
When the switch is pushed closed the circuit is completed
and current flows through the electromagnetic coil.
1. The iron striker is attracted to the electromagnet and strikes the bell.
2. As
the striker moves towards the
bell, the contact is broken.
Electricity stops flowing through the coil which loses its
magnetism.
3.
The spring returns the striker to its original
position
which makes a new contact and so
electricity flows again.
Back to number 1 and the cycle repeats itself.
The bell will continue to ring as long as the switch is held closed.
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