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Understanding capacitors

  1. Jun 28, 2011 #1
    Why do capacitors charge exponentially?
    and do not explain by equations.
     
  2. jcsd
  3. Jun 28, 2011 #2
    Because the current is proportional to the voltage difference, and that voltage difference changes as the capacitor charges.

    At the start, the voltage difference is maximal. It's pushing the current as hard as it can through the resistor. But when those charges arrive, the voltage difference gets a little bit smaller, so it pushes the current a little less hard. Then once those charges arrive, the voltage difference gets smaller still. On and on it goes... smaller voltage differences, smaller currents.

    Does that help?
     
  4. Jun 29, 2011 #3
    thank you,thanks a lot.
    i have some more doubts on capacitors and i ll keep posting them here..
    thanks again.
     
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