How to solve this diode circuit?

Discussion in 'Homework Help' started by LinkyPwns, Dec 5, 2009.

  1. LinkyPwns

    Thread Starter New Member

    Dec 5, 2009
    1
    0
    Can someone help me out with this circuit please?
    [​IMG]
     
  2. PackratKing

    Well-Known Member

    Jul 13, 2008
    850
    215
    dig 'round your salvage components, hook it up and measure it !!

    EOP !
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    This looks like a homework question. If it is, it should be posted in the Homework forum.

    What have you been able to do toward answering the problem yourself?

    hgmjr
     
  4. mumbles

    New Member

    Dec 20, 2004
    9
    0
    I am very confused by the definition of the resistors being defined as 80W, maybe this should be ohm's, especially as if they were both disappating 80W then the zener would have to current flowing from gound.
     
  5. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    If you know the power associated with a resistor and you know the voltage dropped across that resistor, you can use the power formula to compute the resistance.

    hgmjr
     
  6. mumbles

    New Member

    Dec 20, 2004
    9
    0
    I am fully aware that with the knowledge of the power you can calculate the resistance, but with power being set the same, the current through R1 is less then Rl, however if you assume that there was a mistake and W should be Ω. then one of the given answers matchess
     
  7. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Mumbles,

    I agree with your assessment.

    Linkypwns,

    Can you check with your instructor to see if indeed there has been an error made in the problem statement?

    hgmjr
     
  8. boriz

    New Member

    Jul 16, 2009
    48
    0
    Answer is IR1-IRl. Answer is on the list, if you assume 80R.
     
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