$A$ Zener diode is used for

In a Zener diode,breakdown occurs in reverse bias due to

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

Zener breakdown in a semiconductor diode occurs when

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

In the given circuit,the Zener breakdown voltage is $8 \ V$. If the power of the Zener diode is $1.6 \ W$,the value of $R$ is (in $\Omega$)