For a $p-n$ junction,the intensity of the electric field is $1 \times 10^{6} \text{ V/m}$ and the width of the depletion region is $5000 \text{ Å}$. The value of the potential barrier is $\dots \text{ V}$.

In a $PN$-junction diode,the reverse saturation current is ${10^{-5}} \ A$ at $27^\circ C$. Calculate the forward current for a voltage of $0.2 \ V$. Given: $[\exp(7.62) = 2038.6, \ k_B = 1.4 \times {10^{-23}} \ J/K, \ e = 1.6 \times {10^{-19}} \ C]$.

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 $\,A$)

The cut-off voltage of the diodes (shown in figure) in forward bias is $0.6 \,V$. The current through the resistor of $40 \,\Omega$ is ........... $mA$.

$A$ realistic graph depicting the variation of the reciprocal of input resistance $(1/r_i)$ in an input characteristics measurement in a common emitter transistor configuration is:

Which one of the following statements is not correct?