XPost: sci.electronics.basics, alt.electronics.analog   
   From: Daniel47@teranews.com   
      
   Geoffrey wrote:   
   > Dont listen to words.   
   > Get a cap meter and measure it yourself.   
   > Then you will know for sure.   
   >   
   > But please tell me this ...   
   >   
   > If you put two capacitors in series,   
   > Then do you get 180deg of phase shift across them   
   > both or do you simply get 90 degrees   
   > like in a single capacitor ???   
   >   
   > I would like to build a filter  but can   
   > not find an exact value 1/2 of what I got   
   > so I want to put two in series but since this   
   > filter relies on phase shift will putting   
   > two in series to get the right value   
   > mess up the needed phase shift of 90 degrees.   
   >   
   > Regards,   
   > ELI the ICE Man   
   > (p.s.)Voltage leads current by 90 deg in an inductor.   
   > Current leads Voltage in a capacitor by 100 grads.   
   >   
      
   When you put two capacitors in series, the total circuit capacitance can   
   be calculated by:-   
      
   1/CT = 1/C1 + 1/C2   
      
   i.e. invert the value of each capacitor, add these values then invert again.   
      
   Effectively, by putting the two capacitors in series, you are increasing   
   the distance between the capacitors plates.   
      
   Phase shifting will still be the same, as phase shift is not due to the   
   capacitor alone, but in the capacitor and the circuit resistance.   
      
   Daniel   
      
   --- SoupGate-Win32 v1.05   
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