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Q.
The I-V characteristics of a $p-n$ junction diode in forward bias is shown in the figure. The ratio of dynamic resistance, corresponding to forward bias voltages of $2\, V$ and $4\, V$ respectively, is :
JEE MainJEE Main 2022Semiconductor Electronics: Materials Devices and Simple Circuits
Solution:
$R =\frac{\Delta V }{\Delta i }$
$\frac{ R _{1}}{ R _{2}}=\frac{\Delta v _{1}}{\Delta v _{2}} \frac{\Delta i _{2}}{\Delta i _{1}}=\frac{0.1}{0.2} \times \frac{50}{5}=5$
