$A$ Zener diode acts as a/an

The device used for voltage regulation is

For the circuit shown below,the current through the Zener diode is......$mA$

$A$ 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?

Write a short note on a Zener diode.

For the circuit shown below,calculate the value of ${I}_{{z}}$ : (In ${mA}$)