How does resistance add up in open circuit?

Discussion in 'Homework Help' started by sonutulsiani, Mar 18, 2010.

  1. sonutulsiani

    Thread Starter New Member

    Jan 27, 2010
    27
    0
    I got the answer as 21.

    Finding Rab

    10 +15 + 45 = 70

    70 || 30 = 21

    Is it correct?
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,957
    1,097
    Rab=30||(45+15)=30||60=60/3=20
     
  3. Ghar

    Active Member

    Mar 8, 2010
    655
    72
    There is no current flowing in the 10 ohm resistor because it's an open circuit.
    So, you can pretend it's not there at all.
     
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