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Homework Help: Urgent help required,nodal analysis

  1. Sep 16, 2012 #1
    1. The problem statement, all variables and given/known data

    Im a first electrical eng student learning nodal analysis.I require help with a specific problem from fundementals of electric circuits.Please explain step by step as i am new to this.Please see the attachment for the problems.
    I am finding it hard to express the voltages across the 2k and 5k resistors.
    Any help would be greatly appreciated!!!.Thanks in advance!

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

    • Doc3.pdf
      File size:
      102.4 KB
  2. jcsd
  3. Sep 16, 2012 #2
    Hello akshay! Welcome to PF!
    The forum rules says that the OP needs to show his/her attempt before asking for help on the problem.
    Did you try to apply KCL or KVL? There is even a shorter method too to solve this problem.
  4. Sep 16, 2012 #3
    ive tried applying it but cant seem to understand how to get the voltage across the 2k and 5k resistors please help!.Im begging.
  5. Sep 16, 2012 #4
    i think u take the node at the top and maybe the top equals vo
    so at the node so you have (vo-30)/2k+(vo-20)/5k+vo/4k
    or something like that, im not really sure im a first year engineering student too :)
  6. Sep 16, 2012 #5


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    eg Apply KCL at the top node.
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