If the voltage between the terminals $A$ and $B$ is $17\ V$ and the Zener breakdown voltage is $9\ V$,then the potential voltage across $R$ is.......$V$.

$A$ Zener diode is used as:

$A$ Zener diode with a Zener voltage of $30 \text{ V}$ is connected in a circuit as shown in the figure. The maximum current through the Zener diode is: (in $\text{ mA}$)

Which of the following semi-conducting devices is used as a voltage regulator?

Explain the use of a Zener diode as a voltage regulator by drawing a circuit diagram.

$A$ Zener diode voltage regulator operated in the range $120 \, V - 180 \, V$ produces a constant supply of $110 \, V$ and $250 \, mA$ to the load. If the maximum current is equally shared between the load and the Zener diode, then the values of load resistance $(R_L)$ and series resistance $(R_S)$ are respectively