Electromagnets Flashcards

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1
Q

Use of a relay

A

To turn high current circuits on and off
- contains 2 separate circuits

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2
Q

Describe a doorbell

A
  • switch is closed when buzzer pressed
  • causes current to flow through circuit
  • magnetic field produced by electromagnet
  • iron contact attracted towards magnetic field
  • when contact moves towards magnetic field clapper hits bell
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