Diode resistor circuit with 50 cascaded stages

[yoyo13]

Homework Statement

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

Homework 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

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]

Welcome to PF

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.