$A$ Zener diode is used as:

In the circuit shown, what will be the current through the $6 V$ zener diode?

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

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 $R_{S}$?

Take the breakdown voltage of the zener diode used in the given circuit as $6\, V$. For the input voltage shown in the figure below, the time variation of the output voltage is: (Graphs drawn are schematic and not to scale)

Consider the following statements $A$ and $B$ and identify the correct choice of the given answers.
Statement $A$: The potential barrier of a $PN$ junction lies between $0.1 \, V$ to $0.3 \, V$ approximately.
Statement $B$: $A$ Zener diode is always connected in reverse bias.