PN Junction Diode – Interview Q & A – 2

9. What is the static resistance of a diode ? 
Static resistance R of a diode can be defined as the ratio of voltage V across the diode to the current flowing through the diode.

R = V/ I

Where :
R – Static resistance of a diode
V – Voltage across the diode 
I – current across the diode 

10. What is the dynamic resistance ?
Dynamic resistance of a diode can be defined as the ratio of changein voltage across the diode to the change in current through the diode. 

r = ∆V / ∆I 

Where :
 r – Dynamic resistance of a diode 
∆V – change in voltage across the diode 
∆I – change in current through the diode 

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