Slope resistance?

Discussion in 'General Electronics Chat' started by TommyF, Jul 10, 2007.

  1. TommyF

    Thread Starter New Member

    Jul 10, 2007
    3
    0
    Hi everyone, I've got a bit of a problem, I have question I need to answer for college, I'm just wondering if anyone as any ideas.

    I have a DC voltage source, a diode and a load resistor of 25Ohms. The threshold voltage of the diode is 0.6V the slope resistance is 0.015Ohms.

    I need to know the current int the circuit and voltage across the resistor, the drop of voltage across the diode and the power loss in the diode.

    Am I right in thinking I need to add the resistances together before working out the current?

    If anyone could help I would be very grateful.
     
  2. recca02

    Senior Member

    Apr 2, 2007
    1,211
    0
    what is the magnitude of supply voltage ?
     
  3. TommyF

    Thread Starter New Member

    Jul 10, 2007
    3
    0
    Sorry I forgot to add that, it is 34V
     
  4. cumesoftware

    Senior Member

    Apr 27, 2007
    1,330
    10
    The voltage drop across the diode is the same as the thresold voltage. The voltage across the resistor is easy to figure out, and for the current use the Ohm's law. I believe this topic should be it the "Homework help" section, if I'm not mistaken (it seems to be an homework exercise, by the way the circuit is described).
     
  5. TommyF

    Thread Starter New Member

    Jul 10, 2007
    3
    0
    I will post in there in the future, sorry I didn't notice a homework help section until after I posted.
     
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