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yoyo13
Aug14-09, 11:11 PM
1. The problem statement, all variables and given/known data

Find Voltage/Current across each diode:

----R---
|..........|
V.........D
|......... |
----R---

Repeat 50x until:

----R----
............|
............D
............|
----R----

V = power source
D = diode
R = wire resistance
. = empty space

2. Relevant equations

for diode:
V = 0.04654 * ln(I/(0.62E-19)) + I*6.97

for wire:
R = pl/A = 0.02 ohms

Final diode voltage = 2V
Final diode current = 20mA

3. The attempt at a solution
Attempted to use v = ir with wire resistance to find voltage over last-1 diode, but did not work out as current got higher as worked back to source.

Redbelly98
Aug17-09, 08:20 AM
Welcome to PF :smile:

It took me a while to figure out how the circuit looks from your description.

It sounds like you are on track to solving this. The diode currents (and voltages) should get higher as you get closer to the source.