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2 questions I wish I had gone to school for this

  1. Mar 25, 2015 #1
    if anyone wishes to answer my questions would it be too much to ask you to e-mail me the answer.
    Because I get notices that people have answered other questions, For the life of me I don't know where
    the answers are going to.... all I see is the alert that Mr. or Mrs. Peoples answered my question.
    << e-mail address removed by Mentors >>

    before I forget Thank You

    If you attach a charged capacitor to a permanent magnet does it change it to an electromagnet?

    My second question

    ferromagnetic backing plate for a permanent magnet how do you make one or buy one?
    Can I make out of cast iron? If so can it be flat or does it need to be in the form of a cup and press in the magnet?
    Last edited by a moderator: Mar 25, 2015
  2. jcsd
  3. Mar 25, 2015 #2


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    Science Advisor
    Gold Member
    2017 Award

    Hi there
    welcome to PF :smile:

    no it doesn't and of the magnet is as usual, bare metal, then it will just short out the capacitor with a spark

    I tried googling " ferromagnetic backing plate for a permanent magnet " got some oddball results

    would you like to explain what you are doing clearer ?
    maybe some one else knows what you are referring to ?

  4. Mar 26, 2015 #3


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    Staff: Mentor

    The best person best to explain what he has in mind is Diamond Dave. :wink:

    Over to you, Diamond Dave .....
  5. Mar 26, 2015 #4


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    Science Advisor

    But, for the short period of time while the capacitor is discharging, you get a current through the magnet, and you have some combined effect. The current will tend to realign the ferromagnet, so the ferromagnet enhances the power of the electromagnet. I think the ferromagnet behaves like an inductor.
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