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Silicon Diode problem

Discussion in 'Electronics Homework Help' started by atrix370, Dec 8, 2014.

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  1. atrix370

    atrix370

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    Dec 8, 2014
    Im having trouble figuring how to find the current in the diagram below.:confused:


    [​IMG]
     
  2. duke37

    duke37

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    769
    Jan 9, 2011
    What is the voltage across R1?
     
  3. atrix370

    atrix370

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    0
    Dec 8, 2014
    Im not sure is it 10-0.7=9.3v?
     
  4. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    Definitely not.

    The voltage across components that are in parallel is always the same, therefore V(R1)=V(D2)= ?
    The voltage across components that are in series add up, therefore V(D1)+V(R1)+V(R2)= ?

    Hint: Kirchhoffs laws apply.
     
  5. duke37

    duke37

    5,364
    769
    Jan 9, 2011
    You obviously know that D1 drops 0.7V when conducting. Quite correct.
    So what voltage will D2 have across it when conducting?
     
    Harald Kapp likes this.
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