From: PointedEars@web.de   
      
   Thomas 'PointedEars' Lahn wrote:   
   > Kuan Peng wrote:   
   >> 1.	Before the current circulates in coil A, there is not a current in coil   
   >> B .   
   >> 2.	After the current circulates in coil A, a current is induced in coil B.   
   >   
   > In practice there is no "circulating current" as it is an "alternating"   
   > current to maximize the induced current.   
      
   No idea why I put "alternating" in quotes here.  An alternating current   
   changes direction periodically, in practice usually with a frequency of   
   either 50 Hz or 60 Hz, or a mixture of both (so about 50 to 60 times per   
   second):   
      
      
      
   --   
   PointedEars   
      
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