Wolfram Demonstrations Project
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How Doorbells Work

When you push a doorbell (orange button), an electric circuit is completed (gray rectangle) that powers an electromagnet, which makes a striker hit a bell.

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 Enrique Zeleny
"How Doorbells Work"
 http://demonstrations.wolfram.com/HowDoorbellsWork/
 Wolfram Demonstrations Project
 Published: April 6, 2012
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