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Ceramic Capacitor vs Electrolytic Capacitor

Discussion in 'General Electronics Discussion' started by JayJoe, Oct 30, 2016.

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  1. JayJoe


    Jul 31, 2015
    Hi, I have a question regarding capacitors. It may be just a simple question to you, but not for me (sorry, in advance if this question is too simple until it is bothering you)

    I have got 2 joule thief circuits, these two circuits are for the purpose of electrocuting mosquito (a.k.a. mosquito zapper racket?):

    1) First circuit - charging a 16V 10000uF ELECTROLYTIC capacitor with 8.4V.

    2) Second circuit - charging a 2000V 0.0084uF CERAMIC capacitor with 2000V.

    Based on the formula W=(CV^2)/2 , first circuit will dissipates 0.3528J of energy, while second circuit will dissipates 0.0168J of energy. BUT, during short-circuit, the spark produced by second circuit is MUCH larger and louder than the first circuit. I thought first circuit dissipates more energy?

    Anyone can explain to me? Thank you.
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Jan 21, 2010
    The resistance of the larger capacitor probably results in a lower current than that from the higher voltage capacitor.
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