Q. The approximate ratio of resistances in the forward and reverse bias of the $PN$-junction diode is
A) $10^{2}:1$
B) $10^{- 2}:\ 1$
C) $1\ :10^{- 4}$
D) $1\ :10^{4}$
Explanation
(d) Resistance in forward biasing $R_{fr} \approx 10\ \Omega$ and resistance in reverse biasing $R_{R\omega} = 10^{5}\Omega$
$\Rightarrow \frac{R_{fr}}{R_{R\omega}} = \frac{1}{10^{4}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.