$A$ reverse biased Zener diode when operated in the breakdown region works as

The value of power dissipated across the Zener diode $(V_{Z} = 15 \text{ V})$ connected in the circuit as shown in the figure is $x \times 10^{-1} \text{ watt}$. The value of $x$, to the nearest integer, is ..............

$A$ Zener diode with a breakdown voltage of $15 \ V$ is used as a voltage regulator. In the circuit shown,the current flowing through the Zener diode is ...... $mA$.

Zener breakdown takes place if

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

$A$ Zener diode having a breakdown voltage equal to $5 \, V$ is used in the voltage regulator circuit shown in the figure. The current through the diode is ........ $mA$.