Question

When the voltage drop across a p-n junction is increased from 0.80 V to 0.82 V, the change in the diode current is 20 mA. What is the dynamic resistance of the diode ?

Answer 1

`Delta V=0.82-0.800 =0.02 V`
`Deltal =20 mA =20xx10^(-3) A`
`:. ` Dynamic resistance `r_(d)=(DeltaV)/(Deltal)=0.02/(20xx10^(-3))`
`r_(d)=1 Omega`