$PN-$junction diode works as an insulator if connected:

The $i-V$ characteristic of a $P-N$ junction diode is shown in the figure. The approximate dynamic resistance of the $P-N$ junction when a forward bias of $2 \; V$ is applied is ....... $\Omega$.

The electrical resistance of the depletion layer is large because

What is the current in the following junction diode circuit?

The circuit shown contains a $12 \, V$ battery,a $4 \, \Omega$ resistor,and two branches in parallel,each containing an ideal diode and a resistor. Branch $1$ has diode $D_1$ and a $3 \, \Omega$ resistor,while branch $2$ has diode $D_2$ and a $2 \, \Omega$ resistor. Determine the current flowing through the circuit. (in $, A$)

In the circuit shown for the given input voltage $V_i$, the maximum output voltage $V_0$ is