Connect with us

Help with calculating total resistance

Reply to Thread

Discussion in 'Electronics Homework Help' started by dawid921, Mar 15, 2011.

Scroll to continue with content
  1. Mar 15, 2011 #1
    dawid921

    dawid921

    3
    0
    Mar 15, 2011
    9.
    a)Work out the total resistance of the following circuit?
    b) What is the total current of the circuit?
    c) What effect has the capacitor and inductor had on the current and the voltage of the circuit?
    d) What is phase? (use diagrams to explain).

    Thank you in advance. i completely don't know the answers for this question. :/

    YRN- is the number that we got from the teacher, everyone has got different ones, in my case it is 6.
     

    Attached Files:

    • aa.JPG
      aa.JPG
      File size:
      5.9 KB
      Views:
      202
    Last edited: Mar 15, 2011
  2. Mar 15, 2011 #2
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,449
    2,809
    Jan 21, 2010
    OK, so show us what you've figured out so far...
     
  3. Mar 15, 2011 #3
    dawid921

    dawid921

    3
    0
    Mar 15, 2011
    I don't know where to start from...
     
  4. Mar 16, 2011 #4
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,449
    2,809
    Jan 21, 2010
    You need to determine reactance, not resistance.

    Look it up in your notes or in your text. It is a function of frequency and results in a complex number as the answer.

    Then you have several different ones of these in series and parallel.
     
  5. Mar 16, 2011 #5
    dawid921

    dawid921

    3
    0
    Mar 15, 2011
    is that okay ? if not tell me what i need to correct.
     

    Attached Files:

    • rest.JPG
      rest.JPG
      File size:
      58.8 KB
      Views:
      246
    Last edited: Mar 16, 2011
  6. Mar 17, 2011 #6
    Laplace

    Laplace

    1,252
    184
    Apr 4, 2010
    It looks like your formulas are OK but you need to do the calculations with complex algebra since that method allows for combining resistance and reactance into a single impedance. Note first that reactance is represented by an imaginary number (Zl=jωL, Zc=1/jωC) where j=sqrt(-1).

    If you are not up on complex algebra, I know that resistance and reactance can be added together on a polar graph with vector addition but I don't know how to do parallel combinations on a polar graph. Guess you better learn to do complex algebra.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads

  1. Calculating resistance and Base current

  2. Calculating resistance of winding in coil conductor?

  3. Calculating voltages help

  4. Help with calculating Hz in a siren curcuit

  5. !!help calculating voltages and currents!!

  6. Total Resistance of circuit, when there is current source

  7. Calculating electromotive for, and internal resistance of a battery.

  8. Calculating V

Loading...
Electronics Point Logo
Continue to site
Quote of the day

“”

-