If the forward voltage in a semiconductor diode is changed form $0.5\mathrm{V} \mathrm{to} 2\mathrm{V}$, then the forward current changes by $1.5 \mathrm{mA}$. The forward resistance of diode will be

The current flowing through the zener diode in figure is

The adjacent figure shows $I–V$ characteristics of a silicon diode. In this connection three statements are made$–\left(\mathrm{I}\right)$ the region $OC$ corresponds to reverse bias of the diode, $\left(\mathrm{II}\right)$ the voltage at point $A$ is about $0.2 \mathrm{volt}$, and $\left(\mathrm{III}\right)$ different scales have been used along $+\mathrm{ve}$ and $–\mathrm{ve}$ directions of $Y-$axis. Therefore,