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anonymous

  • one year ago

A 10m wire that carries a current of 3A from east to west is placed in a magnetic field of 0.0004T running from south to north. Find the size and direction of the magnetic force on the wire. **how do we find this? :/ Thanks!!:)

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  1. Michele_Laino
    • one year ago
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    the situation described into your problem is: |dw:1433612353948:dw|

  2. anonymous
    • one year ago
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    ok!

  3. Michele_Laino
    • one year ago
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    since magnetic field and current are perpendicular each other, then the magnitude of the magnetic force is: \[\Large F = ILB\] where L = 10 meters

  4. anonymous
    • one year ago
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    yes:)

  5. Michele_Laino
    • one year ago
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    namely: \[\Large F = ILB = 3 \times 10 \times 4 \times {10^{ - 4}}\]

  6. anonymous
    • one year ago
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    ok so we get 0.012?

  7. Michele_Laino
    • one year ago
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    yes! correct the unit of measure is Newtons, so we have: F= 0.012 Newtons

  8. anonymous
    • one year ago
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    is that the size of the force? :/

  9. Michele_Laino
    • one year ago
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    yes! now the direction is given by the rule of product vector, so the orientation of the magnetic force is like below: |dw:1433612811550:dw| namely the vector F is perpendicular to both current and magnetic field, and it is oriented inward of the drawing plane

  10. anonymous
    • one year ago
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    ok! so it is going south?

  11. Michele_Laino
    • one year ago
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    no, it is going inward of the drawing plane, here is a 3-D view: |dw:1433613109921:dw|

  12. anonymous
    • one year ago
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    ohh so it is going northeast?

  13. Michele_Laino
    • one year ago
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    no, that is a 3-D view not a 2-D view

  14. anonymous
    • one year ago
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    ohh i am confused then haha what direction is that ? :/

  15. Michele_Laino
    • one year ago
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    it is perpendicular with respect to North-South direction and it also is perpendicular with respect to West-East direction

  16. anonymous
    • one year ago
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    ohh okay :/ wow confusing hahah :P thank you!! so this problem is complete?

  17. Michele_Laino
    • one year ago
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    yes!

  18. anonymous
    • one year ago
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    yay thank you1!:D

  19. Michele_Laino
    • one year ago
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    :)

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