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Darn Magnets!

  1. Jun 9, 2014 #1
    Hi, I have two questions that I want to solve correctly... and help is a appreciated.

    1. Is the current direction/Poles on right figure correct? https://www.dropbox.com/s/bs3lvak4wda5lqu/23.png

    2. This one I'm sure is wrong... not too sure what I'm doing here.... Are the currents correct at all? Poles, arrows were added by me https://www.dropbox.com/s/24iecu3bm6grlq7/25.png

    Thanks in advance, If I could get insight or answers ASAP that would be great :D
     
  2. jcsd
  3. Jun 9, 2014 #2

    jedishrfu

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  4. Jun 10, 2014 #3
    You're right, I totally forgot about that, Thanks. Do you have any insight into the second question?
     
    Last edited: Jun 10, 2014
  5. Jun 10, 2014 #4
  6. Jun 10, 2014 #5
    Last edited: Jun 10, 2014
  7. Jun 10, 2014 #6

    Simon Bridge

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    current goes from -ve to +ve
    there s a rule for working out the force on a current carrying wire in a magnetic field.
     
  8. Jun 10, 2014 #7

    jedishrfu

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    Using the rule it appears that you've labeled the poles correctly. Im not sure about the cylinder thing. Are you trying to draw an electric motor schematic?
     
  9. Jun 10, 2014 #8
    Sorry, I should have mentioned that it's a magnet with coil wrapped around it. Would the North to South Pole direction change?
     
  10. Jun 10, 2014 #9
    Thanks guys, I suppose my real question is about the electromagnetic pole from the North to South pole that acts on the object between. Does it still go from North to South, or does the wire along the magnet interfere with that?
     
  11. Jun 10, 2014 #10
    I think it still go from north to south, just like ordinary U shaped magnet...
     
  12. Jun 10, 2014 #11
    So the diagram I drew for my 2nd question was correct? I really want to know that I'm doing this right before I get into it. Thanks
     
  13. Jun 10, 2014 #12
    I just understand the electromagnet, I don't understand what is between the magnet in your picture sir..
    As I know, magnetic field come from the north pole to the south pole...one direction, no way back
     
  14. Jun 11, 2014 #13

    NascentOxygen

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    It shouldn't.
     
  15. Jun 11, 2014 #14

    NascentOxygen

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    No, it's not correct.

    What are all those arrows you've drawn on the wire?
     
  16. Jun 12, 2014 #15

    Simon Bridge

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    I was answering another thread with a different diagram it seems.
     
  17. Jun 13, 2014 #16

    NascentOxygen

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    Don't you just hate that, when you get cross-threaded? :wink:

    There exist circuits where current goes from - to + ? Where can I find one?
     
  18. Jun 13, 2014 #17

    adjacent

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    Conventional current?
    I don't think so
     
  19. Jun 13, 2014 #18

    PhysicoRaj

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    In that thread Simon was referring to.. :wink:
     
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