Slope resistance?

Thread Starter


Joined Jul 10, 2007
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.


Joined Apr 27, 2007
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).