In the case of forward biasing of a $PN-$ junction,which one of the following figures correctly depicts the direction of flow of charge carriers?

In the circuit shown for the given input voltage $V_i$, the maximum output voltage $V_0$ is

As per the given circuit,the value of current through the battery will be $\dots \; A$.

The reverse biasing in a $PN$ junction diode

The reverse breakdown voltage for a silicon diode is $6 \ V$ for a particular doping concentration and the forward bias voltage drop is $0.3 \ V$. Find the approximate current through the battery in the given circuit in $Amp$.

The given circuit has two ideal diodes $D_1$ and $D_2$ connected as shown in the figure. The current flowing through the resistance $R_1$ will be (in $\,A$)