The Zener diode has a breakdown voltage $V_{z} = 30\, V$. The current passing through the diode for the following circuit is $\ldots \ldots \ldots \,mA.$

$A$ Zener diode of breakdown voltage $V_{Z} = 8\,V$ and maximum Zener current $I_{ZM} = 10\,mA$ is subjected to an input voltage $V_{i} = 10\,V$ with a series resistance $R = 100\,\Omega$. In the given circuit,$R_{L}$ represents the variable load resistance. The ratio of the maximum and minimum value of $R_{L}$ is

$A$ Zener diode having a breakdown voltage of $5.6 \ V$ is connected in reverse bias with a battery of emf $10 \ V$ and a resistance of $100 \ \Omega$ in series. The current flowing through the Zener diode is (in $mA$)

The correct symbol for a Zener diode is:

The following diagram shows a Zener diode as a voltage regulator. The Zener diode is rated at $V_Z = 5 \text{ V}$ and the desired current in the load is $5 \text{ mA}$. The unregulated voltage source can supply up to $25 \text{ V}$. Considering the Zener diode can withstand four times the load current, the value of resistor $R_S$ (shown in the circuit) should be . . . . . . $\Omega$. (in $\text{ } \Omega$)

$A$ Zener diode is to be used as a voltage regulator. Identify the correct setup.