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 Form 2 Physics Magnetic Effect of Electric Current Questions and Answers

The figure below shows an electromagnetic relay. Explain what happens when the switch is closed.

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Answer Text:
The current flowing on the solenoid, magnetizes the soft iron core which then attracts the iron armature, due to the presence of the pivot the iron armature will push the lower spring metal upward closing the contacts. The closed contact will complete the other circuit, making the bell ring.