From: jasen@xnet.co.nz   
      
   On 2019-02-11, RichD  wrote:   
   > Looking at network theory and the duality theorems,   
   > why is there no mutual capacitance?  i.e. electric   
   > flux linkages, symmetric to mutual inductance and B flux.   
      
   you'll see something like mutual capacitance in piezo-electric transformers.   
      
      
      
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