maximum load current in zener diode

Discussion in 'Homework Help' started by Hafiz Rafeeq, Sep 7, 2015.

  1. Hafiz Rafeeq

    Thread Starter New Member

    Sep 7, 2015
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    q24.png
    in the circuit shown, find maximum load current
     
  2. bwilliams60

    Active Member

    Nov 18, 2012
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    If this is homework, it should go under the homework tab. Have you made any attempt at doing this yourself? Perhaps some background would help.
     
  3. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
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    hi Hafiz,

    You have shown a supply voltage of only 3.2 Volts, is this correct.?
    E
     
  4. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    What are the component values?
    Where is the load?
     
  5. PeterCoxSmith

    Member

    Feb 23, 2015
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    in the circuit given the current is constant (3.2/(R1+RV1)) (until the battery runs down) and the zener diode will never turn on
     
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  6. Hafiz Rafeeq

    Thread Starter New Member

    Sep 7, 2015
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    sorry the qstn was wrong... Untitled.png
     
  7. PeterCoxSmith

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    Feb 23, 2015
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    24V/RV1
     
  8. Hafiz Rafeeq

    Thread Starter New Member

    Sep 7, 2015
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    but i am looking for a specific numeric answer
     
  9. crutschow

    Expert

    Mar 14, 2008
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    You've been given enough information to calculate that.
     
  10. Hafiz Rafeeq

    Thread Starter New Member

    Sep 7, 2015
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    t
    the people who gave me the question at least think so..
     
  11. #12

    Expert

    Nov 30, 2010
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    I'm going to Tennessee. I don't know how far it is but I will be traveling at 65 miles per hour. How long will I have to drive at that speed. I want a specific numeric answer.
     
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  12. ian field

    Distinguished Member

    Oct 27, 2012
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    What was the number they came up with on The Hitch Hikers Guide to the Galaxy?
     
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  13. #12

    Expert

    Nov 30, 2010
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    Forty-two. :p
     
  14. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    42. (Sorry, I forgot we're not allowed to give answers to Homework questions :)).

    Edit: Pipped at the post by #12!
     
  15. PeterCoxSmith

    Member

    Feb 23, 2015
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    then start putting in some numbers. You know you want 10mA through the zener so set the value of R1 with RV1 open circuit. Change value of RV1 and see how R1 must change to keep 10ma in the zener plus the current in RV1. Try a whole series of values for RV1, plot some graphs. Use Excel.
     
  16. DerStrom8

    Well-Known Member

    Feb 20, 2011
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    This forum is not here to do your homework for you. That's your job.
     
  17. WBahn

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    Mar 31, 2012
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    MOD NOTE: Moved from General Electronics Chat to Homework Help.
     
  18. bertus

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  19. WBahn

    Moderator

    Mar 31, 2012
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    It depends on what specifications you make regarding the design.

    First, are you sure that the power rating on the zener is 600 W and not 600 mW?

    A common design approach for a circuit like this (at least in an academic setting) is to design the circuit so that the zener is operating at it's maximum current allowable when the load is at one of its extreme limits. What would that mean for this circuit?
     
  20. bwilliams60

    Active Member

    Nov 18, 2012
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    I could have swore someone already said that. :p
     
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