The reading of the ammeter for a silicon diode in the given circuit is ....... $mA$.

In a semiconductor $p-n$ diode,the doping concentrations on $p$-side and $n$-side are $10^{15} \text{ atoms/cm}^3$ and $10^{18} \text{ atoms/cm}^3$,respectively. Which one of the following statements is true?

In the figure,two $P-N$ junctions are connected. In which of the following connections will the voltages across the $P-N$ junctions be equal?

$A$ $2 \ V$ 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 $A$)

In the reverse biasing of a $p-n$ junction diode,

In the diodes shown in the diagrams,which one is reverse biased?