Very basic capacitor question

Discussion in 'General Electronics Chat' started by russpatterson, Mar 5, 2010.

  1. russpatterson

    Thread Starter Member

    Feb 1, 2010
    351
    16
    Hi there,

    If I'm using a 100uF 16V cap but only charging it to 2.7V. Can I know how many farads I'm actually getting in charge?

    Thanks!
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,135
    1,786
    Charge is not measured in farads. The unit of charge is the coulomb. The 16V is the rating of the capacitor. It means that you should not try to charge it with a voltage greater than 16 Volts. Check out the following article:

    http://en.wikipedia.org/wiki/Capacitance

    Code ( (Unknown Language)):
    1.  
    2. Q = C * V
    3. Q = (100e-6)(2.7) = 270 micro-coulombs
    4.  
    5. In terms of actual charge carriers
    6.  
    7. (6.241e18)(270e-6) = 1.685e15 electrons
    8.  
    9. If electrons were $'s you'd be rich
    10.  
     
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