In order to forward bias a $PN$ junction,the negative terminal of the battery is connected to

In the figure shown, if the diode forward voltage drop is $0.2 \, V$, the voltage difference between $A$ and $B$ is (in $V$)

$A$ $2\,V$ battery forward biases a diode. There is a drop of $0.5\,V$ across the diode which is independent of current. Also,a current greater than $10\,mA$ produces large joule heat and damages the diode. If the diode is to be operated at $5\,mA$,the series resistance to be used is:

In the given figure,which of the diodes are forward biased?

When a forward bias is applied to a $p-n$ junction,it

The curve between charge density $\rho$ and distance $r$ near a $p$ - $n$ junction is best represented by