$A$ Zener diode is used as:

For the given circuit,the power across the zener diode is ..... $mW$.

In a Zener regulated power supply, a Zener diode with $V_{z} = 6.0 \; V$ is used for regulation. The load current is to be $4.0 \; mA$ and the unregulated input is $10.0 \; V$. What should be the value of the series resistor $R_{S}$?

In the given circuit,the current through the Zener diode is.....$mA$.

In the circuit given,the current through the Zener diode is ....... $mA$.

An $8\,V$ Zener diode along with a series resistance $R$ is connected across a $20\,V$ supply (as shown in the figure). If the maximum Zener current is $25\,mA$,then the minimum value of $R$ will be $\Omega$.