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Math Help - [SOLVED] No idea where to start!

  1. #1
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    [SOLVED] No idea where to start!

    [Question]
    A bridged T-network gives rise to the following equation,

    S=R/omega^4L^2C^2 + J{2/omegaC - 1/omega^3LC^2} If the imaginary term
    equates to zero, show that, the equation can be rewritten as R=S/4

    I apologise if i've written it badly!


    I have absolutely no idea of where to start with this problem
    If i could get some direction in how to begin to tackle this problem that would be great

    I'm sorry if i've posted in the wrong section

    Regards

    Ally
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  2. #2
    Super Member Matt Westwood's Avatar
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    If the imaginary part equals zero, that means that 2/(omega C) = 1/(omega^3) L C^2).

    So you should be able to express omega^2 in terms of L and C. Plugging that into the real part of your equation it should drop into your lap.
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  3. #3
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    Many thanks, I'll give it a go and see how I get on.
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  4. #4
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    I cant seem to get omega^2 I can only get omega^-2. I end up with 2LC^2/C = omega^-2. I've went wrong somewhere, I just don't know where


    Any help is SOOOOOO apprecciated!
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  5. #5
    Super Member Matt Westwood's Avatar
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    Flip it upside down then.
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  6. #6
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    so i end up with 2LC^2/C = 1/omega^2?
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  7. #7
    Super Member Matt Westwood's Avatar
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    Try omega^2 = 1/(2LC) (note you can also cancel out a C top and bottom of the other bit).

    This is university level electronics? Long time since I did this...
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  8. #8
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    This is just some questions I have to do before i am allowed to do my university course, Many thanks fo helping me out with this. I've been stuck on it for two weeks just staring at it hoping divine inspiration would happen. It didn't
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  9. #9
    Super Member Matt Westwood's Avatar
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    But did this help? Did you get the answer in the end?
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  10. #10
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    I've not finished the whole thing yet, its 0100hrs here at the moment so i'm going hit the hay and try and finish it in the morning. I'm quite sure i'll be posting tomorrow morning, or should i say later today!
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  11. #11
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    I've finished it now, thanks to all who helped me
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  12. #12
    Super Member Matt Westwood's Avatar
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    Please feel free to press the "thanks" button attached to any of the helpers' messages that have helped you. Also, you'll find in "thread tools" at the top of the thread an opportunity to mark the thread as "Solved". This alerts others to the fact that the problem is in fact solved and they won't need to inspect it.
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