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Homework Help: Magnetic Field Inside a Charging Capacitor

  1. Oct 20, 2013 #1
    1. The problem statement, all variables and given/known data
    A 10-cm-diameter parallel-plate capacitor has a 1.0 mm spacing. The electric field between the plates is increasing at the rate 1.4×106V/m*s.
    What is the magnetic field strength 2.7cm from the axis?

    2. Relevant equations


    3. The attempt at a solution
    I tried using the first equation:
    7.2E-13T which is wrong
  2. jcsd
  3. Oct 20, 2013 #2


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    2017 Award

    Staff: Mentor

    "A" should be the area your integral encloses, not the total area of the capacitor.
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