Two identical ideal diodes are connected to an ammeter and a $1 \ V$ d.c. source as shown. In which one of the following circuits will the ammeter not show any deflection?

The voltage-current characteristic of a diode during forward bias is given by $I = 7.8 \times 10^{-5} e^{6.5 V_D}$, where $I$ is the current in $mA$ and $V_D$ is the diode voltage in $V$. Find the dynamic resistance of the diode in $\Omega$, when the current is $4 \ mA$.

In the circuit,if the forward voltage drop for the diode is $0.5 \,V$,the current will be.....$ mA$

$P-N$ junction is said to be forward biased,when

$A$ circuit and the signal applied at its input terminal $(V_i)$ are shown in the figure below. Which one of the options correctly describes the output waveform $(V_0)$? (Assume all the devices used are ideal and take $P$ as the reference potential.)

Determine $V_{CE}$ in the following silicon-based transistor circuit. (in $V$)