In the given circuit,the current is $0.1 \ A$. The resistance of the $P-N$ junction is .... $\Omega$.

Which of the following statements concerning the depletion zone of an unbiased $PN$ junction is (are) true?
$(A)$ The width of the zone is independent of the densities of the dopants (impurities).
$(B)$ The width of the zone is dependent on the densities of the dopants.
$(C)$ The electric field in the zone is produced by the ionized dopant atoms.
$(D)$ The electric field in the zone is provided by the electrons in the conduction band and the holes in the valence band.

Two identical $p-n$ junctions are connected in series with a battery in three ways,as shown below. The potential drops across the two $p-n$ junctions are equal in:

Which of the following statements is not correct when a junction diode is in forward bias?

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

In a $PN-$ junction diode not connected to any circuit: