A Zener diode is connected to a battery and a load as show below: The currents, $I, I_Z$ and $I_L$ are respectively .

The value of power dissipated across the zener diode $\left( V _{ z }=15 V \right)$ connected in the circuit as shown in the figure is $x \times 10^{-1}$ watt. 

The value of $x ,$ to the nearest integer, is …………..

For the circuit shown below, calculate the value of ${I}_{{z}}$ : (In ${mA}$)

The $I-V$ characteristics of an electronic device shown in the figure. The device is:

An experiment is performed to determine the $I-V$ characteristics of a Zener diode, which has a protective resistance of $R = 100 \,\Omega ,$ and a maximum power of dissipation rating of $1\,W$ .The minimum voltage range of the $DC$ source in the circuit is