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Homework Help: E field induced by changing B field

  1. Apr 7, 2010 #1
    1. The problem statement, all variables and given/known data
    The magnetic field inside a 5.0-cm-diameter solenoid is 2.0 T and decreasing at 4.90 T/s
    What is the electric field strength inside the solenoid at point on the axis?


    2. Relevant equations
    E=(r/2)*(dB/dt)


    3. The attempt at a solution

    E=(.025/2)*(4.9)= 0.06125 V/m

    Not sure what's wrong here....

    Thanks,
    David
     
  2. jcsd
  3. Nov 21, 2010 #2
    Should be 0 because the distance from the axis is 0.
     
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