Resistance of the resistor and of the diode

  • Thread starter moenste
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gneill
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Right, the diode has no resistance. We only have the resistance of the RD.
The diode has resistance RD when it is conducting.
First graph has 40 Ω. Second has 20 Ω as net resistance. And since we have 1 / 20 = 1 / 40 - 1 / R so R = 40 Ω. Like this?
You already had R from the first case. You were looking for RD in the second case. But the same math applies, and you have in fact found RD.
 
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