What is the value of the current through the diode in the given circuit (in $\text{ mA}$)?

$A$ circuit is arranged as shown in the figure. The output voltage ${V}_{0}$ is equal to $\ldots \ldots \text{ V}$.

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

Assuming that the junction diode is ideal, find the current in the arrangement shown in the figure. (in $\text{mA}$)

When a forward bias is applied to a $p-n$ junction,it $\qquad$ .

$A$ $2 \ V$ cell is connected across points $A$ and $B$ as shown in the figure. Assume that the resistance of each diode is zero in forward bias and infinity in reverse bias. The current supplied by the cell is (in $A$)