$A$ Zener diode is used as:

The correct symbol for a Zener diode is:

In a Zener diode,breakdown occurs in reverse bias due to

$A$ $5.0 \, V$ stabilized power supply is required to be designed using a $12 \, V$ $DC$ power supply as an input source. The maximum power rating of the zener diode is $2.0 \, W$. The minimum value of resistance $R_{s}$ in $\Omega$ connected in series with the zener diode will be (in $.5$)

The graph given below represents $I-V$ characteristics of a Zener diode. The part of the characteristics curve that is most relevant for its operation as a voltage regulator is

Take the breakdown voltage of the zener diode used in the given circuit as $6\, V$. For the input voltage shown in the figure below, the time variation of the output voltage is: (Graphs drawn are schematic and not to scale)