Voltage across a Capacitor

Discussion in 'Homework Help' started by CircuitNube, Sep 22, 2011.

  1. CircuitNube

    Thread Starter New Member

    Sep 22, 2011
    1
    0
    Say I have a capacitor in series with a resistor, and those components are in parallel with a resistor. This circuit is being charged by a current source. The circuit has been connected and on for a long time, so the capacitor is charged. How can I find the voltage across that capacitor? Here is a crude drawing to clarify, Is=Current Source, RΩ=Resistor, C=capacitor.


    _________________
    l l l
    RΩ Is
    l l l
    l l C
    l l l
     
  2. Hi-Z

    Member

    Jul 31, 2011
    157
    17
    If the circuit has settled, then the capacitor is not playing any further part, and could be removed from the circuit. I'm not sure I understand the diagram, but, reading the words, it sounds as though everything is now at a potential equal to IR (where R is the parallel resistor). So the capacitor will be charged to this value.
     
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