$A$ $p-n$ 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$)

The curve between charge density and distance near a $P-N$ junction will be:

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 $, A$)

For the diode,the characteristic curves are given at different temperatures. The relation between the temperatures is

In a reverse biased diode, when the applied voltage changes by $1 \, V$, the current is found to change by $0.5 \, \mu A$. The reverse bias resistance of the diode is

Which one of the diodes given below is reverse biased?