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Homework Help: Adding resistance in parallel

  1. Oct 16, 2016 #1
    1. The problem statement, all variables and given/known data
    Find total Resistance

    2. Relevant equations
    1/Req= (1/R1)+(1/R2)...

    3. The attempt at a solution
    Can someone please explain me how 5 ohm R and 3ohm R are in series and then in parallel with the 2ohm R? Thanks
  2. jcsd
  3. Oct 16, 2016 #2


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    Staff: Mentor

    Highlight all paths that can take you from one end of the 2 Ω resistor to its other end. If there's only one path without branches, then whatever lies along that path must be in series.
  4. Oct 16, 2016 #3


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    Science Advisor
    Homework Helper
    Gold Member

    +1 but note that the 20R is short circuited by the middle switch so can be deleted.
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