E-field from Time Varying B-field of Current wire

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SUMMARY

The discussion focuses on calculating the electric field generated by a time-varying magnetic field from a current-carrying wire. The magnetic field B is defined using the equation B=μ*I(t)(sin(α)+sin(β))/(4*pi), where I(t) represents the time-varying current and α and β are the angles at the ends of the wire. The relationship between the electric field E and the magnetic field B is established through Faraday's law, expressed as ∇×E=−dB/dt and dEψ/dz = −dB/dt. This analysis is crucial for understanding electromagnetic induction in scenarios involving time-varying currents.

PREREQUISITES
  • Understanding of Faraday's Law of Electromagnetic Induction
  • Familiarity with Maxwell's Equations
  • Knowledge of vector calculus, specifically curl and divergence
  • Basic concepts of electromagnetic fields and waves
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  • Study the derivation of Faraday's Law in detail
  • Explore the implications of Maxwell's Equations in time-varying fields
  • Learn about the applications of electromagnetic induction in engineering
  • Investigate the relationship between electric and magnetic fields in wave propagation
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Homework Statement


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.

Homework 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.*

The Attempt at a Solution


∇×E=−dB/dt .

dEψ/dz = −dB/dt .
 
Last edited:
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Faraday's law can be written as

\oint\vec{E}.\vec{dl} = - d∅/dt
 
Last edited:

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