In the given circuit if the power rating of Zener diode is $10 \mathrm{~mW}$, the value of series resistance $R_s$ to regulate the input unregulated supply is:

In the given circuit, the current through zener diode is……$mA$

A certain $p-n$ junction, having a depletion region of width $20 \,\mu m$, was found to have a breakdown voltage of $100 \,V$. If the width of the depletion region is reduced to $1 \,\mu m$ during its production, then it can be used as a zener diode for voltage regulation of ………. $V$

A zener diode is specified as having a breakdown voltage of $9.1 \;V$, with a maximum power dissipation of $364 \;mW$. What is the maximum current ($mA$) the diode can handle?

Figure shown a $DC$ voltage regulator circuit, with a Zener diode of breakdown voltage $= 6\,V$. If the unregulated input voltage varies between $10\, V$ to $16\, V$, then what is the maximum Zener current ?…….$mA$