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《物理电学》英文版教学课件The ic Force Between Two Parallel Conductors.ppt

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Whenacurrent-icfieldB,icforceontheconductorisgivenby:F=I·(LxB).Considertwoparallelwiresofequallengthcarryingasteadycurrent:;,carryingcurrentI2,icfieldB2atthepositionofwire1.-icfieldB2isperpendiculartothewire.-F1=F2on1=I1·(LxB2)-=F2on1=I1·(LxB2)=I1·L·B2·sinqF1=F2on1=I1·L·B2Biot-icfieldB2:Substituting:Rewritingintermsoftheforceperunitlength:ThedirectionofF1isdownwardandisdeterminedusingtherighthandrule(fingersofrighthandindirectionofcurrentI;palmfacinginthedirectionofB;thumbpointsdowninthedirectionofF1)icforcethatwire1exertsonwire2(F1on2)isequalinmagnitudetoandoppositeindirectiontoF1(F2on1).,:parallelconductorscarryingcurrentsinthesamedirectionattracteachother;-carryingstraightwiresParallelwireswithcurrent

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