Chapter 29 Maxwell,s Equations and Electromagnetic Waves So, at non-steady current, Ampere law can be rewritten as: h- dl=l L s I dy aD h. dl as at 1)全电流是连续的; 2)位移电流和传导电流一样激发磁场; 3)传导电流产生焦耳热,位移电流不产生焦耳热Chapter 29 Maxwell’s Equations and Electromagnetic Waves t Ψ H l I I L d d d = s = c +          == + s d ( c ) ds t D H l j L      So, at non-steady current, Ampere law can be rewritten as: 1）全电流是连续的； 2）位移电流和传导电流一样激发磁场； 3）传导电流产生焦耳热，位移电流不产生焦耳热