In a Zener diode,

Manufacturers supply a zener diode with zener voltage $V_{z}=5.6 \, V$ and maximum power dissipation $P_{z \max }=\frac{1}{4} \, W$. This zener diode is used in the following circuit. Calculate the minimum value of the resistance $R_s$ in the circuit so that the zener diode will not burn when the input voltage is $V_{in}=10 \, V$. (in $\Omega$)

Which of the following is heavily doped?

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 $R_{S}$?

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 $25\,mA$ and the load current is negligible, then the minimum value of $R$ will be $\Omega$.

In the given circuit,what is the maximum value of $R_S$ (in $k\Omega$) for the Zener diode to regulate the voltage across the load resistance $R_L$?