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Which describes the magnetic flux through a section of a loop?

  1. Apr 6, 2012 #1
    1. The problem statement, all variables and given/known data

    Which describes the magnetic flux through a section of a loop?

    A. It is a vector that is directed outward through the section.
    B. It is a vector that is directed inward through the section.
    C It is a vector that is tangent to the section.
    D. It is a scalar.


    2. Relevant equations

    http://edugen.wileyplus.com/edugen/courses/crs4957/halliday9118/halliday9088c30/math/math114.gif

    3. The attempt at a solution

    I think the answer is D because there is no direction when solving for magnetic flux.

    I just want verification, thank you.
     
  2. jcsd
  3. Apr 6, 2012 #2
    Now I'm thinking that the answer is A.
     
  4. Apr 6, 2012 #3

    gneill

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    Staff: Mentor

    If you look up the defining calculation for the magnetic flux you should have your answer; does the calculation produce a vector or a scalar?
     
  5. Apr 6, 2012 #4
    Wow. Thanks gneill. I think I know the answer.

    Phi = B.A

    It has SI units of the weber (Wb) which is a tesla metre squared (Tm^2) and is a scalar

    Am I right?
     
  6. Apr 6, 2012 #5

    gneill

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    Staff: Mentor

    Yup. Equivalent units are also V-s (Volt-second). This becomes important when you start looking for induced emf's due to rates of change of flux :smile:
     
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