Which of the following graphs is correct for a $P-N$ junction? (When the $P-N$ junction is forward biased.)

In a $p-n$ junction diode, the thickness of the depletion layer is $2 \times 10^{-6} \,m$ and the barrier potential is $0.3 \,V$. The intensity of the electric field at the junction is

In the following circuit of $PN$ junction diodes $D_1, D_2$ and $D_3$ are ideal,then the current $i$ is:

In the following diode circuits,which diode is in a forward-biased condition?

Find the current flowing through the ideal diode in the given circuit. (in $A$)

In a $p-n$ junction diode, an electric field of magnitude $2 \times 10^5 \ V/m$ exists in the depletion region. $A$ particle with charge $-3e$ can diffuse from $n$-side to $p$-side, if it has a minimum kinetic energy of $0.6 \ eV$. The width of the depletion region of the $p-n$ junction is: (in $nm$)