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Difference between polarised and non polarised capacitor.

Discussion in 'General Electronics Discussion' started by somanshumehta, Jun 27, 2013.

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  1. somanshumehta


    Jun 22, 2013
    Actually in continuation of my project,I came across capacitors and looked more deeply for their various kinds.Can somebody tell me where to use polarised and non-pol cap?
    Also the advantage of using electrolytic cap.
  2. BobK


    Jan 5, 2010
    You can use a polarized capacitor when one side is always at a higher potential then the other. Connect the + lead to the side that is higher. Otherwise, use a non-polarized capacitor. Exception: if there is only a few millivolts max across the capacitor, a polarized one is okay.

  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    Polarised capacitors generally have a higher capacitance for a given size. You use them when you want a high capacitance in a small package. If we could make non-polarised capacitors of equivalent capacity, voltage rating, etc., in the same size package, polarised capacitors would probably disappear almost overnight.
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