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ETO Online Quiz Sheets.

Discussion in 'Site Issues & Feedback' started by ericgibbs, Feb 19, 2012.

  1. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    Q4 and Q10 were swapped over in order to place the image question as the last question, thats all.
     
  2. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

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    Ah, ok. was wondering about that. Thanks Eric :)
     
  3. Pommie

    Pommie Well-Known Member Most Helpful Member

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    I still need a required voltage for Q4. Or, if I don't then someone please explain.

    Mike.
     
  4. dave

    Dave New Member

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  5. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

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    It's an ohm's law problem. You are told that the voltage across the two series resistors is 8 volts, and you are given the total current through the resistors. Using that, you can find the total resistance of the circuit, and go from there.

    Regards
     
  6. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    hi,
    I had failed to swap the Answer boxes for 4 and 10.!! duh!!:eek:

    Try it now.

    Mike,
    Open another cannie, you're OK.:D
     
    Last edited: Feb 28, 2012
  7. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

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    Hahaha, now it looks better. Thanks :D
     
  8. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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  9. colin55

    colin55 Well-Known Member

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    Last edited by a moderator: Mar 2, 2012
  10. colin55

    colin55 Well-Known Member

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  11. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    This is a poorly presented post, would you care to explain in terms the rest of us can understand what you are trying to say.??:confused:
     
  12. colin55

    colin55 Well-Known Member

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    How much of my posting were you able to understand?
     
  13. ElectroMaster

    ElectroMaster Administrator

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    Eric, I believe Colin means that there are some text within the images that are highlighted blue when they look as though they should be in black

    [​IMG]

    See the 4v7
     
    Last edited: Mar 3, 2012
  14. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    hi EM,
    The voltages in Blue near the Zener's indicate the Zener voltage, I did this so the user would not have to lookup the zener datasheet.

    I honestly do not believe its necessary to make any changes to the images based on what Colin has to say, he knows perfectly well what the drawings represent.

    E.
     
  15. colin55

    colin55 Well-Known Member

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    I was referring to Q7.
     
  16. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

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    What difference does it make? It's the same idea--blue is used in all of the diagrams to show the zener voltage.

    How is this:
    View attachment 61820

    any different from this:
    View attachment 61821

    in that sense? They both have the same "problem" you are complaining about.
     
    Last edited: Mar 5, 2012
  17. colin55

    colin55 Well-Known Member

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    If you can't see the problem, I am wasting my time.
     
  18. DerStrom8

    DerStrom8 Super Moderator Most Helpful Member

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    You're not exactly making your question clear. If you can't clarify your problem, then you're wasting my time.

    Why is it a problem if the zener voltage is the same color as vout? The zener label is way over by the diode, not near vout. How is it confusing?
     
    Last edited: Mar 5, 2012
  19. MrAl

    MrAl Well-Known Member Most Helpful Member

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    Eric,


    Here is the corrected drawing for Q9 of Quiz 7. I made a slight error in the drawing so here is the corrected version. Thanks.


    Trivia note:
    Anyone pronounce "Euler's" as either:
    "you-lers"
    or as "eee you-lers"
    or as "oil-ers" ?
     
    Last edited: Mar 5, 2012
  20. Jugurtha

    Jugurtha Member

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    Quizz V7.0 by Mr Al (Electronic and Electrical). Score = 7

    Here's what I got wrong:

    Q2 (Transformers), Q6 (LCD) and Q10.

    It was a nice test. Just per curiosity, for the question on State Space. Would you go for Laplace and find the inverse matrix of (p-IA) + Discretization (sampling of 1ms to find F and H), then Commandability matrix Wc and find the Command Vector Uc . Or did you just calculate it from the equation of a charging capacitor and replaced t with 10 ms ? (Knowing that if you do that, you'll find 95.162e-3).

    Doing that with matrix calculations isn't worth it for a first order system in my opinion, so I guess you did it another way that's better and faster.

    Thanks,
     
    Last edited: Mar 11, 2012
  21. ericgibbs

    ericgibbs Well-Known Member Most Helpful Member

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    Last edited: Apr 3, 2012
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