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Homework Help: Difference voltage in LRC-series

  1. Jun 4, 2015 #1
    1. The problem statement, all variables and given/known data
    Our setup:
    Connect the transformer to an LRC-series circuit(L= 2mH with iron core,C=1mF and R=10Ω). Use the 2V and 6V outputs of the transformer, the effective voltage supplied by the transformer will then be 2 V.

    Use the digital multimeter to measure the effective voltages(Vob) across the LRC-series, and the voltage across each component. Compare Vr+Vc+Vl with Vob. Qualitatively explain the difference.

    Well our measured Vob was close to 2V ofcourse:2,07V

    So the sum of al the voltages across the components is 3.25V.

    So a difference of 1,18V

    So my question is how to qualitatively explain the difference

    2. Relevant equations

    3. The attempt at a solution
    i though the causes are Dielectic losses and losses by hysteresis, but i am not sure about that and i can't argue why these losses will increase the voltage of the components.
  2. jcsd
  3. Jun 4, 2015 #2


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    Homework Helper
    Gold Member

    Are you sure about adding the voltages algebraically? Are they in phase?? Use AC fundamentals..
    Last edited: Jun 4, 2015
  4. Jun 4, 2015 #3


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    Staff: Mentor

    It is not clear how using the 2 V and 6 V outputs of the transformer will yield an effective output of 2 V. What aren't you telling us about the transformer setup?

    What is the frequency of the voltage source supplying the transformer? It can be location dependent (e.g. European versus North American power standards).
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