The curve between charge density and distance near a $P-N$ junction will be:

$A$ potential barrier of $0.4 \,V$ exists across a p-n junction. An electron enters the junction from the $n$-side with a speed of $6.0 \times 10^{5} \,ms^{-1}$. The speed with which the electron enters the $p$-side will be $\frac{x}{3} \times 10^{5} \,ms^{-1}$. The value of $x$ is ..............
(Given: mass of electron $= 9 \times 10^{-31} \,kg$,charge on electron $= 1.6 \times 10^{-19} \,C$.)

In the circuit shown in the figure,the non-zero potential difference across diode $D_{1}$ and that across diode $D_{2}$ are equal. Are the diodes identical in characteristics? Explain.

Barrier potential of a $p-n$ junction diode does not depend on:

Which one of the following graphs represents the forward bias characteristic of a diode?

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