Displacement Current and Magnetic Field: A Connection to Time-Varying Electric Fields, Study notes of Electrical and Electronics Engineering

Download Displacement Current and Magnetic Field: A Connection to Time-Varying Electric Fields and more Study notes Electrical and Electronics Engineering in PDF only on Docsity! ECE 3300 Displacement current Displacement Current Time-varying electric field produces magnetic field To relate this to current: Why all this??? Conduction Current carries charges. Displacement current represents displacement (rotationally) of molecules, but no actual motion. H t D ×−∇= ∂ ∂ )()/( )/()( :_ )(_ : )(_ __ _ : :' : )( * * ** εεεωεσεεε ωεσεωεωεωεσ ε ωεεωεσ ω ε σ ε σσ ω ′′−′=−= −==+ = ∂ ∂ =+= −= ∂ ∂ ∂ ∂ += ∂ ∂ += ∂ ∂ += +=• =•=• ∂ ∂ =• •= •×∇=• ∂ ∂ − ∫ ∫∫ ∫ ∫ ∫∫ ooro oro tj C CS enclosed C C SS j jjjj Complex EjE t EjcurrentTotal So Ej t E dependencetimeeFor E tt E E t D EcurrentTotal CurrentntDisplacemeCurrentConductiondH CurrentntDisplacemedHsd t D WhichGives IdH sLawAmpere dH remStokesTheo SdHsd t D l l l l