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kym02

  • 2 years ago

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  1. kym02
    • 2 years 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
    • 2 years 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
    • 2 years ago
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    Quick question, is this related to the right hand grip rule?

  4. theEric
    • 2 years 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
    • 2 years ago
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    I assume that "x" is "into the screen."

  6. kym02
    • 2 years ago
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    and the dot out of the screen?

  7. theEric
    • 2 years ago
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    You try! :)

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

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

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

  11. theEric
    • 2 years ago
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    |dw:1397261630895:dw|

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

  13. theEric
    • 2 years 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
    • 2 years ago
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    ohhh woah you made it so easy.

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

  16. kym02
    • 2 years ago
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    Thanks a lot!

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