In the given circuits $(a)$,$(b)$,and $(c)$,the potential drop across the two p-n junctions are equal in:

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?

In a reverse-biased $pn$-junction diode,the depletion layer width:

State the methods of connection of $p-n$ junction.

Consider a circuit consisting of a capacitor $(20 \mu\text{F})$, a resistor $(100 \Omega)$, and two identical diodes as shown in the figure. The resistance of each diode under forward biasing condition is $10 \Omega$. The time constant of the circuit is $\alpha \times 10^{-3} \text{ s}$. The value of $\alpha$ is . . . . . . .

$A$ $p-n$ junction diode is reverse biased with a voltage of $8 \, V$. If the resistance of the diode is $4 \times 10^7 \, \Omega$, then the reverse saturation current is: (in $ \, \mu A$)