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kym02

  • 10 months ago

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  1. kym02
    • 10 months ago
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    Sketch the field lines for the magnetic fields associated with the currents shown in the diagram below. (The dots and crosses show the direction of the currents.) WARNING: The drawing is a a bit crappy. sorry. :/ |dw:1397260188233:dw|

  2. theEric
    • 10 months ago
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    Hi! Do you know that the magnetic field "spins around" a wire? Well, the direction of the field at a point ((due to one wire)) is always perpendicular to the imaginary line that connects it to the wire. But perpendicular could be two ways. |dw:1397261007941:dw|

  3. kym02
    • 10 months ago
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    Quick question, is this related to the right hand grip rule?

  4. theEric
    • 10 months ago
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    Right!! Right hand rule. What you do is you take you're thumb. You point it in the direction of the current. Then you look how your fingers are curled. The magnetic field has that same curl!|dw:1397261214896:dw|

  5. theEric
    • 10 months ago
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    I assume that "x" is "into the screen."

  6. kym02
    • 10 months ago
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    and the dot out of the screen?

  7. theEric
    • 10 months ago
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    You try! :)

  8. theEric
    • 10 months ago
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    http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magcur.html#c1

  9. theEric
    • 10 months ago
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    Now, magnetic field vectors add. So you'll see that |dw:1397261439666:dw||dw:1397261494265:dw|

  10. theEric
    • 10 months ago
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    And|dw:1397261563303:dw|will turn into

  11. theEric
    • 10 months ago
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    |dw:1397261630895:dw|

  12. kym02
    • 10 months ago
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    ahh now i understand! :) what does that arrow in between the dot and the cross represent?

  13. theEric
    • 10 months ago
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    You'll need to put these together or re-apply these concepts for you're bigger picture! :) The big arrow, here?|dw:1397261722560:dw|That's because the electric fields add, there, to be EXTRA strong! Between two of the same kind, however, the field CANCELS because they're in opposite directions. It's like \((1)+(-1)=0\)

  14. kym02
    • 10 months ago
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    ohhh woah you made it so easy.

  15. theEric
    • 10 months ago
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    I have to go. Good luck! I'm glad! :)

  16. kym02
    • 10 months ago
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    Thanks a lot!

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