In a semiconductor diode,the $P$-side is earthed and the $N$-side is put at a potential of $-2\,V$. The diode shall

The depletion region of a $p-n$ junction:

When a semiconducting device is connected in series with a battery and a resistance, a current is found to flow in the circuit. If, however, the polarity of the battery is reversed, practically no current flows in the circuit. The device may be

Which of the following graphs is correct for a $P-N$ junction? (When the $P-N$ junction is forward biased.)

For the given circuit of a $PN-$ junction diode,which of the following statements is correct?

In the following circuit shown in the figure,three diodes are connected,each with a forward resistance of $40 \Omega$ and infinite backward resistance. The current through the $100 \Omega$ resistance is: (in $mA$)