What is threshold voltage? Write the value of threshold voltage for $Ge$ and $Si$.

Consider a $p-n$ junction as a capacitor, formed with $p$ and $n$-materials acting as thin metal electrodes and depletion layer width acting as separation between them. Basing on this, assume that an $n-p-n$ transistor is working as an amplifier in $CE$ configuration. If $C_1$ and $C_2$ are the base-emitter and collector-emitter junction capacitances, then :

Two sides of a semiconductor germanium crystal $A$ and $B$ are doped with arsenic and indium respectively. They are connected to a battery as shown in the figure. The correct graph between current and voltage for the arrangement is:

$A$ crystal diode is a:

In a semiconductor diode,the $P$-side is earthed and the $N$-side is put at a potential of $-2\,V$. The diode shall

For an ideal diode,in forward and reverse biased condition the resistance is respectively