Analysis serial-parallel circuit help

Discussion in 'General Electronics Chat' started by DrWack, Mar 20, 2005.

  1. DrWack

    Thread Starter New Member

    Mar 20, 2005
    2
    0
    Hello,

    In......All About Circuits > Volume I - DC > Chapter 7: SERIES-PARALLEL COMBINATION CIRCUITS > Analysis technique. It states the equivalent resistor values for R1(100ohms) and R2(250ohms) is equivalent to 71.492ohms as a single resistor. I do not understand how this works. Can someone help explain it?

    DrWack
     
  2. Firestorm

    Senior Member

    Jan 24, 2005
    353
    0
    these 2 resistors are connected in parallel to each other. Therefore the formula (also stated in vol. 1 ch. 5 under parallel circuits.) is ...
    RTotal = 1 / (1/R1 + 1/R2 + . . . 1/Rn)
    does this make sense?
    here it is worked out-
    RTotal = 1/ (1/100+1/250)
    RTotal = 1/ (0.014)
    RTotal = approx. 71Ω
    hope this helps

    -fire
     
  3. DrWack

    Thread Starter New Member

    Mar 20, 2005
    2
    0
    Ohhh...it makes sense now. Thanks a lot man.

    DrWack
     
  4. Firestorm

    Senior Member

    Jan 24, 2005
    353
    0
    np :), feel free to ask more questions....

    -fire
     
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