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Capacitor Charging, Energy Flow

  1. Dec 5, 2007 #1
    Gentlemen and Ladies - Requesting a little clarification on this.

    Heres the setup: I have "steady" voltage source - In this case from a battery (Vb)
    Have three capacitors (C1, C2, C3). Have 2 Resistors R1 and R2.

    Here are the relationships:
    Capacitance Voltage Resistance
    C1 = C2 = C3 1/2Vb = Vc1 = Vc3 = 1/3Vc2 R1 = R2

    Two scenarios:
    Scenario A:
    Connect Vb in Parallel with Vc1 placing R1 in between.

    Scenario B:
    Connect Vc2 in Parallel with Vc3 placing R2 in between.

    Initial Potential Difference in Scenario B is Double that of Scenario A.


    Here are the Voltage relationships AFTER "running" the above Scenarios.
    Vb = Vc1 = Vc3 = Vc2

    Even though we have raised C1 and C3 to the same Voltage - My question comes down to how much energy actually flowed through R1 and R2 during this process?

    Would we calculate this using Ohms Law and Measure the Current and Voltage at specific intervals and then use I^2R or should we just use capacitor energy calculations on C1 and C3.

    The heart of the question is what's the relation between "energy flows" between the 2 Scenarios?
  2. jcsd
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