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Electromagnet homework problem

  1. Feb 12, 2006 #1
    I am stuck on this homework question and would apprieciate a bit of help please.

    Put the following sentences in the correct order to explain how the bell works.

    *The springy metal pulls back the hammer

    *A current flows through the electromagnet

    *At the same time, the circuit is broken at point C

    *Tom presses the bell push

    *The electromagnet attracts the iron armature

    *At C, the circuit is complete again

    *The hammer strikes the gong

    Thanks in advance!
  2. jcsd
  3. Feb 12, 2006 #2


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    Hi and welcome to PF blackicerose!
    If you have read this thread, you will see that you need to show your attempt or your ideas at solving homework questions.
  4. Feb 12, 2006 #3

    Sorry didn't read that. Thanks.

    This is what I thought......

    1. Tom presses the bell push.
    2. At the same time, the circuit at point C is broken.
    3. A current flows through the electromagnet.
    4. The electromagnet attracts the iron armature.
    5. At C, the circuit is complete again.
    6. The springy metal pulls the hammer back.
    7. The hammer strikes the gong.
  5. Feb 12, 2006 #4


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    Just imagine, if you break a part of the conducting wire in a circuit, then the current does not flow. But, if you complete the circuit by fixing the broken part, then current flows.

    So you mixed up a few steps.
    This site may help http://en.wikipedia.org/wiki/Electric_bell
    Last edited: Feb 12, 2006
  6. Feb 12, 2006 #5
    does that mean i mixed up 5 & 6?
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