If $p-n$ junction diode is reverse biased,then:

In the following circuit,the reading in the ammeter is (in $mA$)

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

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 . . . . . . .

What will be the current flowing in the circuit?

In the given figure,each diode has a forward bias resistance of $30\, \Omega$ and infinite resistance in reverse bias. The current ${I}_{1}$ will be $....\,A$.