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B Need help with voltage across a capacitor in a DC circuit

  1. Oct 29, 2016 #1
    In a RC circuit is voltage through a capacitor always consider negative no matter if you're going with or against the current when setting up a voltage equation?
     
  2. jcsd
  3. Oct 29, 2016 #2

    CWatters

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    Short answer no.

    Travelling with the current the voltage is negative (eg a Voltage drop). Against it, positive.
     
  4. Oct 29, 2016 #3

    CWatters

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    PS is this a DC or AC circuit?
     
  5. Oct 29, 2016 #4
    It's a DC. We will not be covering AC until a couple more weeks.
     
  6. Oct 30, 2016 #5

    CWatters

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    Ok in which case there is only current flowing while the capacitor is charging.
     
  7. Oct 30, 2016 #6

    David Lewis

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    My understanding is current could also flow when the capacitor is discharging.
     
  8. Oct 31, 2016 #7

    CWatters

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    oops yes that as well.
     
  9. Oct 31, 2016 #8

    NascentOxygen

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    I don't know what you mean by the wording of your question. It would be better if you came up with some schematics on which you can base your question.
     
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