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anonymous

  • one year ago

A 6.0 m section of wire carries a current of 5.2 A from east to west in the earth's magnetic field of 1.0 × 10^-5 T at a location where the magnetic field points south. In which direction does the magnetic force act on the wire? north, south, up, or down ?

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  1. Michele_Laino
    • one year ago
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    |dw:1434314594879:dw|

  2. anonymous
    • one year ago
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    down?

  3. Michele_Laino
    • one year ago
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    we have to compute the magnitude of the magnetic field due to the wire

  4. anonymous
    • one year ago
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    how can we do that? what does it mean?

  5. Michele_Laino
    • one year ago
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    since we have to do a vector sum between the magnetic field of the wire and the earth's magnetic field

  6. anonymous
    • one year ago
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    ohh so it is moving south?

  7. Michele_Laino
    • one year ago
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    please sorry, it is not necessary to compute the magnetic field due to the wire

  8. anonymous
    • one year ago
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    ahh okie!

  9. anonymous
    • one year ago
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    so what does that mean? south is our solution?

  10. Michele_Laino
    • one year ago
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    the answer is up, since the magnetic forc acting on that wire is given by the subsequent formula: \[{\mathbf{F}} = I\;{\mathbf{l}} \times {\mathbf{B}}\] where x stands for vector product. So the direction of the force is up with respect to the plane of the drawing

  11. anonymous
    • one year ago
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    ohhh okay! :O thank you!! that makes sense:)

  12. Michele_Laino
    • one year ago
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    |dw:1434315132306:dw|

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