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Homework Help: Estimated equivalent resistance

  1. May 24, 2012 #1
    "Estimated" equivalent resistance

    1. The problem statement, all variables and given/known data

    Suppose I have a circuit like the one below, how will you "estimated" the equivalent resistance without using calculation?

    I know how to calculate equivalent resistance by using Formula: R1 * R2 / (R1+R2) . But can anyone use their logic and estimate the equivalent resistance without using any formulas?

    Thank you!
  2. jcsd
  3. May 25, 2012 #2


    User Avatar

    Staff: Mentor

    Re: "Estimated" equivalent resistance

    One resistor has 10X the value of the other, so it represents a minor "load" compared to the smaller resistor. So the net resistance should be just a shade under the smaller resistance (by about one tenth).
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