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

In the circuit shown,assume the diode to be ideal. When $V_{i}$ increases from $2 \ V$ to $6 \ V$,the change in the current is (in $mA$):

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 $, A$)

The width of the depletion layer of a $p-n$ junction diode,when it is $(i)$ forward biased and $(ii)$ reverse biased,respectively,is:

The value of net resistance of the network as shown in the given figure is:

Explain the barrier potential and depletion region in a $p-n$ junction diode.