A zener 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 series resistance R =100…

A zener of breakdown voltage $\displaystyle \mathrm{V}_{\mathrm{Z}}=8 \mathrm{~V}$ and maximum zener current, $\displaystyle \mathrm{I}_{\mathrm{ZM}}=10 \mathrm{~mA}$ is subjected to an input voltage $\displaystyle \mathrm{V}_i=10 \mathrm{~V}$ with series resistance $\displaystyle \mathrm{R}=100 \Omega$. In the given circuit $\displaystyle \mathrm{R}_{\mathrm{L}}$ represents the variable load resistance. The ratio of maximum and minimum value of $\displaystyle R_L$ is \_\_\_\_.