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Homework Help: E-field from Time Varying B-field of Current wire

  1. May 8, 2013 #1
    1. The problem statement, all variables and given/known data
    Time Varying Current carrying wire creates time varying magnetic field.How can we analytically calculate electric field at distance r from the time varying current carrying wire?

    I(t) is time varying current

    where α , β are angle of two ends of current carrying wire.

    2. Relevant equations

    B=μ*I(t)(sin(α)+sin(β)/(4*pi) direction given by right hand thumb rule.in Phi direction.
    *consider length of wire to very very less than wavelength of changing current.*

    3. The attempt at a solution
    ∇×E=−dB/dt .

    dEψ/dz = −dB/dt .
    Last edited: May 8, 2013
  2. jcsd
  3. May 8, 2013 #2


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    Faraday's law can be written as

    [itex]\oint[/itex][itex]\vec{E}[/itex].[itex]\vec{dl}[/itex] = - d∅/dt
    Last edited: May 8, 2013
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